Postfix não recebe e-mail, só envia.

Pessoal, estou montando um servidor de e-mail com o Postfix + courier imap, e courier pop3 e ele só está enviando e-mail, não consigo receber email.
Por favor me ajudem.

Segue o arquivo main.cnf

smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
biff = no

# appending .domain is the MUA's job.
append_dot_mydomain = no

# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h

readme_directory = no

# TLS parameters
smtpd_tls_cert_file=/etc/ssl/certs/ssl-cert-snakeoil.pem
smtpd_tls_key_file=/etc/ssl/private/ssl-cert-snakeoil.key
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache

myhostname = servidor.avaloncom.com.br
mydomain = avaloncom.com.br
append_dot_mydomain = no
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = avaloncom.com.br, servidor.avaloncom.com.br, localhost.avaloncom.com.br, localhost
mynetworks = 127.0.0.0/8, 187.8.201.0/24
relay_domains = $mynetworks
home_mailbox = Maildir/
mailbox_command = procmail -a "$EXTENSION"
inet_interfaces = all
inet_protocols = all
message_size_limit = 20000000
mailbox_size_limit = 0
recipient_delimiter = +
default_transport = smtp

vc usa link dedicado? se usar verifique a autencidade do seu IP junto ao seu provedor de acesso. Provavelmente o seu dns reverso esteja batendo no dns do seu provedor.

Você já fez testes internamente?
Criar duas contas e ver se mandando de uma conta pra outra se elas recebem?
Eu uso Qmail, mas já configurei Postfix para uma turma que dei treinamento, tive esse problema também, ele não entregava os emails para as contas, você chegou a verificar os logs?

Experimente comentar essa linha do procmail
# mailbox_command = procmail -a "$EXTENSION"

Adicione o comentário e reinicie o serviço, depois faça o teste!
Comigo o detalhe estava aí!

Abraço

Cristianff, você é o cara.
Valeu mesmo , funcionou certinho.
Abração.

Haha, valeu velho, estamos aí pra isso mesmo, compartilhar!

Abraço

Agora outro problema. só recebo da rede interna, ;///
sabe o que que pode ser ?

Envio para todo mundo, e recebo só da rede local.
tá complicado.

Acho que agora pode ser suas regras do IPTABLES!
Para confirmar isso, deixe ACCEPT temporariamente INPUT e faça um teste.
Mas agora deve ser configuração da sua rede, confirma se o seu DNS está funcionando!

Estou com o mesmo problema.

Fale ae pessoal, estou com mesmo problema do nosso amigo acima. Meu servidor não recebe emails externos, somente interno. Quanto ao envio tudo funciona.
Já tentei tudo possível, horas de google, livro do Morimoto mas não funciona.
O meu sistema é o Ubuntu Server 8.10 funcionando como DNS, Webserver, Webmail. Além disso a administração é auxiliada pelo Webmin e Virtualmin.
Abaixo vou colocar alguns arquivos de configuração e resultados de testes.
Desde já agradeço pela ajuda!

main.cf

Código :

# Debian specific:  Specifying a file name will cause the first
# line of that file to be used as the name.  The Debian default
# is /etc/mailname.
#myorigin = /etc/mailname
 
smtpd_banner = $myhostname ESMTP $mail_name (Ubuntu)
biff = no
 
# appending .domain is the MUA's job.
append_dot_mydomain = no
 
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
 
readme_directory = no
 
# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
 
myhostname = servidor.ieahost.sc.usp.br
mydomain = ieahost.sc.usp.br
alias_maps = hash:/etc/aliases
alias_database = hash:/etc/aliases
myorigin = /etc/mailname
mydestination = /etc/postfix/local-host-names
relayhost =
mynetworks = 127.0.0.0/8, 143.107.226.144/28
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
home_mailbox = Maildir/
message_size_limit = 20000000
virtual_maps = hash:/etc/postfix/virtusertable
 
smtpd_sasl_local_domain =
smtpd_sasl_auth_enable = yes
smtpd_sasl_security_options = noanonymous
broken_sasl_auth_clients = yes
smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination
smtpd_tls_auth_only = no
 
smtp_use_tls = yes
smtp_tls_note_starttls_offer = yes
smtpd_tls_CAfil = /etc/postfix/ssl/cacert.pem
smtpd_tls_loglevel = 1
smtpd_tls_received_header = yes
smtpd_tls_session_cache_timeout = 3600s
smtpd_tls_cert_file = /etc/postfix/ssl/smtpd.crt
smtpd_tls_key_file = /etc/postfix/ssl/smtpd.key
smtpd_tls_session_cache_database = btree:${queue_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${queue_directory}/smtp_scache
tls_random_source = dev:/dev/urandom

telnet localhost 25

Código :

root@servidor:~# telnet localhost 25
Trying 127.0.0.1...
Connected to localhost.localdomain.
Escape character is '^]'.
220 servidor.ieahost.sc.usp.br ESMTP Postfix (Ubuntu)
helo localhost
250 servidor.ieahost.sc.usp.br
quit
221 2.0.0 Bye
Connection closed by foreign host.

O arquivo /etc/aliases está vazio

netstat -atn

Código :

root@servidor:~# netstat -atn
Active Internet connections (servers and established)
Proto Recv-Q Send-Q Local Address           Foreign Address         State
tcp        0      0 0.0.0.0:20000           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:3306            0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:10000           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:80              0.0.0.0:*               LISTEN
tcp        0      0 143.107.226.158:53      0.0.0.0:*               LISTEN
tcp        0      0 143.107.226.157:53      0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:53            0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:21              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:22              0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:25              0.0.0.0:*               LISTEN
tcp        0      0 127.0.0.1:953           0.0.0.0:*               LISTEN
tcp        0      0 0.0.0.0:443             0.0.0.0:*               LISTEN
tcp        0    388 143.107.226.157:22      189.18.200.210:49953    ESTABLISHED
tcp        0      0 127.0.0.1:36338         127.0.0.1:143           TIME_WAIT
tcp        0      0 143.107.226.157:80      189.18.200.210:50490    TIME_WAIT
tcp        0      0 127.0.0.1:36339         127.0.0.1:143           TIME_WAIT
tcp        0      0 143.107.226.157:80      189.18.200.210:50496    TIME_WAIT
tcp        0      0 127.0.0.1:36340         127.0.0.1:143           TIME_WAIT
tcp6       0      0 :::993                  :::*                    LISTEN
tcp6       0      0 :::995                  :::*                    LISTEN
tcp6       0      0 :::110                  :::*                    LISTEN
tcp6       0      0 :::143                  :::*                    LISTEN
tcp6       0      0 :::22                   :::*                    LISTEN
tcp6       0      0 :::25                   :::*                    LISTEN
tcp6       0      0 127.0.0.1:143           127.0.0.1:36341         TIME_WAIT
tcp6       0      0 127.0.0.1:143           127.0.0.1:36338         TIME_WAIT

Configurações DNS

db.ieahost

Código :

root@servidor:~# vim /etc/bind/db.ieahost
$TTL 86400
@       IN SOA  servidor.ieahost.sc.usp.br. hostmaster.ieahost.sc.usp.br. (
        2009020501 3H 15M 1W 1D )
        NS servidor.ieahost.sc.usp.br.
        NS ns2.ieahost.sc.usp.br.
        IN MX 10 servidor.ieahost.sc.usp.br.
ieahost.sc.usp.br.      A       143.107.226.157
www                     A       143.107.226.157
ftp                     A       143.107.226.157
smtp                    A       143.107.226.157
ns2                     A       143.107.226.158

db.ieahost.rev

Código :

root@servidor:~# vim /etc/bind/db.ieahost.rev
$TTL 86400
@       IN SOA  servidor.ieahost.sc.usp.br. hostmaster.ieahost.sc.usp.br. (
        2009020501 3H 15M 1W 1D )
        NS servidor.ieahost.sc.usp.br.
        NS ns2.ieahost.sc.usp.br.
        IN MX 10 servidor.ieahost.sc.usp.br.
157     PTR     ieahost.sc.usp.br.
158     PTR     ns2.ieahost.sc.usp.br.
157     PTR     www.ieahost.sc.usp.br.
157     PTR     ftp.ieahost.sc.usp.br.
157     PTR     smtp.ieahost.sc.usp.br.

db.cienciaweb

Código :

root@servidor:~# vim /etc/bind/db.cienciaweb
$TTL 86400
@       IN      SOA     servidor.cienciaweb.com.br. hostmaster.cienciaweb.com.br. (
                        2009020502
                        3H
                        15M
                        1W
                        1D )
        NS servidor.cienciaweb.com.br.
        NS ns2.cienciaweb.com.br.
cienciaweb.com.br.      IN      MX      1 servidorcienciaweb.com.br.
cienciaweb.com.br.      A       143.107.226.157
www                     A       143.107.226.157
ftp                     A       143.107.226.157
smtp                    A       143.107.226.157
ns2                     A       143.107.226.158
webmail                 A       143.107.226.157
servidor                A       143.107.226.157

db.cienciaweb.rev

Código :

root@servidor:~# vim /etc/bind/db.cienciaweb.rev
$TTL 86400
@       IN SOA  servidor.cienciaweb.com.br. hostmaster.cienciaweb.com.br. (
        2009020501 3H 15M 1W 1D )
        NS servidor.cienciaweb.com.br.
        NS ns2.cienciaweb.com.br.
        IN MX 1 servidor.cienciaweb.com.br.
157     PTR     cienciaweb.com.br.
158     PTR     ns2.cienciaweb.com.br.
157     PTR     www.cienciaweb.com.br.
157     PTR     ftp.cienciaweb.com.br.
157     PTR     servidor.cienciaweb.com.br.

Logs

/var/log/mail.err

Código :

root@servidor:~# vim /var/log/mail.err
Aug 24 21:21:46 servidor postfix/smtpd[27770]: fatal: non-null host address bits in "143.107.226.157/28", perhaps you should use "143.107.226.144/28" instead
Aug 24 21:22:23 servidor postfix/smtpd[27874]: fatal: non-null host address bits in "143.107.226.157/28", perhaps you should use "143.107.226.144/28" instead
Aug 25 07:03:39 servidor procmail[22471]: Renamed bogus "/var/mail/cienciaweb" into "/var/mail/BOGUS.cienciaweb.nX"

/var/log/mail.info

Código :

root@servidor:~# vim /var/log/mail.info
Aug 25 20:54:59 servidor postfix/master[20373]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 20:55:03 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60288], protocol=IMAP
Aug 25 20:55:03 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:55:04 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60289], protocol=IMAP
Aug 25 20:55:04 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:55:17 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60290], protocol=IMAP
Aug 25 20:55:17 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:55:18 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60291], protocol=IMAP
Aug 25 20:55:18 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:55:18 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60292], protocol=IMAP
Aug 25 20:55:18 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:55:19 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60293], protocol=IMAP
Aug 25 20:55:19 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:57:08 servidor postfix/postalias[20523]: warning: /etc/aliases, line 5: name must be local
Aug 25 20:57:08 servidor postfix/postalias[20524]: warning: /etc/aliases, line 5: name must be local
Aug 25 20:57:08 servidor postfix/postfix-script[20598]: refreshing the Postfix mail system
Aug 25 20:57:08 servidor postfix/master[20373]: reload configuration /etc/postfix
Aug 25 20:57:56 servidor postfix/master[20373]: terminating on signal 15
Aug 25 20:57:56 servidor postfix/master[20709]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 20:58:15 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60294], protocol=IMAP
Aug 25 20:58:15 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:58:43 servidor postfix/postfix-script[20804]: refreshing the Postfix mail system
Aug 25 20:58:43 servidor postfix/master[20709]: reload configuration /etc/postfix
Aug 25 20:58:47 servidor postfix/postfix-script[20892]: refreshing the Postfix mail system
Aug 25 20:58:47 servidor postfix/master[20709]: reload configuration /etc/postfix
Aug 25 20:58:54 servidor postfix/master[20709]: terminating on signal 15
Aug 25 20:58:54 servidor postfix/master[21000]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 21:00:29 servidor postfix/master[21000]: terminating on signal 15
Aug 25 21:00:30 servidor postfix/master[21181]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 21:00:48 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33827], protocol=IMAP
Aug 25 21:00:48 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:49 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33828], protocol=IMAP
Aug 25 21:00:49 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:50 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33829], protocol=IMAP
Aug 25 21:00:50 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:51 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33830], protocol=IMAP
Aug 25 21:00:51 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:51 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33831], protocol=IMAP
Aug 25 21:00:51 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:52 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33832], protocol=IMAP
Aug 25 21:00:52 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:53 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33833], protocol=IMAP
Aug 25 21:00:53 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:53 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33834], protocol=IMAP
Aug 25 21:00:53 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:54 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33835], protocol=IMAP
Aug 25 21:00:54 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:04:02 servidor postfix/master[21181]: terminating on signal 15
Aug 25 21:04:03 servidor postfix/master[21584]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 21:04:15 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[41706], protocol=IMAP
Aug 25 21:04:15 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:11:05 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[43507], protocol=IMAP
Aug 25 21:11:05 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:21:05 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[51795], protocol=IMAP
Aug 25 21:21:05 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:23:08 servidor postfix/smtpd[22432]: connect from localhost.localdomain[127.0.0.1]
Aug 25 21:23:16 servidor postfix/smtpd[22432]: disconnect from localhost.localdomain[127.0.0.1]
Aug 25 21:31:05 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[40725], protocol=IMAP
Aug 25 21:31:05 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0

Logs

/var/log/mail.log

Código :

root@servidor:~# vim /var/log/mail.log
Aug 25 20:57:08 servidor postfix/postalias[20524]: warning: /etc/aliases, line 5: name must be local
Aug 25 20:57:08 servidor postfix/postfix-script[20598]: refreshing the Postfix mail system
Aug 25 20:57:08 servidor postfix/master[20373]: reload configuration /etc/postfix
Aug 25 20:57:56 servidor postfix/master[20373]: terminating on signal 15
Aug 25 20:57:56 servidor postfix/master[20709]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 20:58:15 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 20:58:15 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[60294], protocol=IMAP
Aug 25 20:58:15 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 20:58:43 servidor postfix/postfix-script[20804]: refreshing the Postfix mail system
Aug 25 20:58:43 servidor postfix/master[20709]: reload configuration /etc/postfix
Aug 25 20:58:47 servidor postfix/postfix-script[20892]: refreshing the Postfix mail system
Aug 25 20:58:47 servidor postfix/master[20709]: reload configuration /etc/postfix
Aug 25 20:58:54 servidor postfix/master[20709]: terminating on signal 15
Aug 25 20:58:54 servidor postfix/master[21000]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 21:00:29 servidor postfix/master[21000]: terminating on signal 15
Aug 25 21:00:30 servidor postfix/master[21181]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 21:00:48 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:48 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33827], protocol=IMAP
Aug 25 21:00:48 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:49 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:49 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33828], protocol=IMAP
Aug 25 21:00:49 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:50 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:50 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33829], protocol=IMAP
Aug 25 21:00:50 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:51 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:51 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33830], protocol=IMAP
Aug 25 21:00:51 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:51 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:51 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33831], protocol=IMAP
Aug 25 21:00:51 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:52 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:52 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33832], protocol=IMAP
Aug 25 21:00:52 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:53 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:53 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33833], protocol=IMAP
Aug 25 21:00:53 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:53 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:53 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33834], protocol=IMAP
Aug 25 21:00:53 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:00:54 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:00:54 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[33835], protocol=IMAP
Aug 25 21:00:54 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:04:02 servidor postfix/master[21181]: terminating on signal 15
Aug 25 21:04:03 servidor postfix/master[21584]: daemon started -- version 2.5.5, configuration /etc/postfix
Aug 25 21:04:15 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:04:15 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[41706], protocol=IMAP
Aug 25 21:04:15 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:11:05 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:11:05 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[43507], protocol=IMAP
Aug 25 21:11:05 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:21:05 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:21:05 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[51795], protocol=IMAP
Aug 25 21:21:05 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0
Aug 25 21:23:08 servidor postfix/smtpd[22432]: connect from localhost.localdomain[127.0.0.1]
Aug 25 21:23:16 servidor postfix/smtpd[22432]: disconnect from localhost.localdomain[127.0.0.1]
Aug 25 21:31:05 servidor imapd: Connection, ip=[::ffff:127.0.0.1]
Aug 25 21:31:05 servidor imapd: LOGIN, user=cienciaweb, ip=[::ffff:127.0.0.1], port=[40725], protocol=IMAP
Aug 25 21:31:05 servidor imapd: LOGOUT, user=cienciaweb, ip=[::ffff:127.0.0.1], headers=0, body=0, rcvd=87, sent=391, time=0

/var/log/mail.warn

Código :

root@servidor:~# vim /var/log/mail.warn
Aug 23 06:54:49 servidor postfix/smtp[20543]: warning: no MX host for ieahost.sc.usp.br has a valid address record
Aug 23 06:54:49 servidor postfix/smtp[20543]: warning: no MX host for ieahost.sc.usp.br has a valid address record
Aug 24 21:21:46 servidor postfix/smtpd[27770]: fatal: non-null host address bits in "143.107.226.157/28", perhaps you should use "143.107.226.144/28" instead
Aug 24 21:21:47 servidor postfix/master[27523]: warning: process /usr/lib/postfix/smtpd pid 27770 exit status 1
Aug 24 21:21:47 servidor postfix/master[27523]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
Aug 24 21:22:23 servidor postfix/smtpd[27874]: fatal: non-null host address bits in "143.107.226.157/28", perhaps you should use "143.107.226.144/28" instead
Aug 24 21:22:24 servidor postfix/master[27868]: warning: process /usr/lib/postfix/smtpd pid 27874 exit status 1
Aug 24 21:22:24 servidor postfix/master[27868]: warning: /usr/lib/postfix/smtpd: bad command startup -- throttling
Aug 25 02:29:48 servidor postfix/trivial-rewrite[6577]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 04:52:23 servidor postfix/trivial-rewrite[14851]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 04:59:15 servidor postfix/trivial-rewrite[15197]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 04:59:15 servidor postfix/trivial-rewrite[15197]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 05:45:31 servidor postfix/trivial-rewrite[17762]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 07:02:57 servidor postfix/trivial-rewrite[22468]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 07:03:39 servidor procmail[22471]: Renamed bogus "/var/mail/cienciaweb" into "/var/mail/BOGUS.cienciaweb.nX"
Aug 25 07:05:46 servidor postfix/trivial-rewrite[22624]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 07:06:57 servidor postfix/trivial-rewrite[22893]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 07:40:24 servidor postfix/trivial-rewrite[25142]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 07:40:55 servidor postfix/trivial-rewrite[25157]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 07:53:47 servidor postfix/trivial-rewrite[25845]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 09:05:15 servidor postfix/trivial-rewrite[28742]: warning: do not list domain cienciaweb.com.br in BOTH mydestination and virtual_alias_domains
Aug 25 09:05:15 servidor postfix/tlsmgr[28747]: warning: request to update table btree:/var/spool/postfix/smtpd_scache in non-postfix directory /var/spool/postfix
Aug 25 09:05:15 servidor postfix/tlsmgr[28747]: warning: redirecting the request to postfix-owned data_directory /var/lib/postfix
Aug 25 09:05:15 servidor postfix/tlsmgr[28747]: warning: request to update table btree:/var/spool/postfix/smtp_scache in non-postfix directory /var/spool/postfix
Aug 25 09:05:15 servidor postfix/tlsmgr[28747]: warning: redirecting the request to postfix-owned data_directory /var/lib/postfix
Aug 25 20:57:08 servidor postfix/postalias[20523]: warning: /etc/aliases, line 5: name must be local
Aug 25 20:57:08 servidor postfix/postalias[20524]: warning: /etc/aliases, line 5: name must be local

O meu era DNS

root@servidor:~# vim /etc/bind/db.ieahost
$TTL 86400
@ IN SOA servidor.ieahost.sc.usp.br. hostmaster.ieahost.sc.usp.br. (
2009020501 3H 15M 1W 1D )
NS servidor.ieahost.sc.usp.br.
NS ns2.ieahost.sc.usp.br.
IN MX 10 servidor.ieahost.sc.usp.br.
ieahost.sc.usp.br. A 143.107.226.157
www A 143.107.226.157
ftp A 143.107.226.157
smtp A 143.107.226.157
ns2 A 143.107.226.158
servidor A <ip do servidor>

O MEU ERA ISSO. NÃO ESQUECE DE MUDAR O ID DO ARQUIVO (2009020501). DEPOIS DE ALGUMAS HORAS O DNS VAI VOLTAR.

ESPERO QUE AJUDE.

db.ieahost:

IN MX 0 mx.ieahost.sc.usp.br.

mx IN A 143.107.226.157

Creio que ambos os problemas seja de DNS agora!
Nos seus logs existem vários warms, veja lá o que eles estão pedindo.
Abraço