Eu configurei meu servidor de e-mail com o Postfix para SMTP e o Dovecot para IMAP. Em vez de usuários virtuais, simplesmente escutei a sugestão de alguém do Server Fault e fui com usuários do Linux. Estou usando o RainLoop como um serviço de webmail. Eu configurei o SPF e, para que meus e-mails cheguem a outros provedores, preciso usar a autenticação.
Então eu (tentei) configurar o TLS para trabalhar com o certificado SSL que obtive usando o cliente Let's Encrypt. O seguinte é meu arquivo main.cf :
# domain name and public server ip are replaced with mydomain.co.il and 127.0.0.1
# See /usr/share/postfix/main.cf.dist for a commented, more complete version
# 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 $mail_name (Ubuntu)
biff = no
# appending .domain is the MUA's job.
append_dot_mydomain = no
# Uncomment the next line to generate "delayed mail" warnings
#delay_warning_time = 4h
readme_directory = no
# TLS parameters
smtpd_tls_cert_file=/etc/letsencrypt/live/mydomain.co.il/cert.pem
smtpd_tls_key_file=/etc/letsencrypt/live/mydomain.co.il/privkey.pem
smtpd_use_tls=yes
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_tls_received_header = yes
smtpd_tls_security_level = may
smtp_tls_security_level = may
smtp_tls_loglevel = 1
smtpd_tls_loglevel = 1
# See /usr/share/doc/postfix/TLS_README.gz in the postfix-doc package for
# information on enabling SSL in the smtp client.
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated defer_unauth_destination
myhostname = mail.mydomain.co.il
alias_maps = hash:/etc/postfix/aliases
alias_database = hash:/etc/postfix/aliases
transport_maps = hash:/etc/postfix/transport
myorigin = mydomain.co.il
mydestination = mail.mydomain.co.il, localhost.mydomain.co.il, localhost, hash:/etc/postfix/transport
relayhost =
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 192.168.10.0/24 127.0.0.1 # last one is the server's public ip
mailbox_command = procmail -a "$EXTENSION"
mailbox_size_limit = 0
recipient_delimiter = +
inet_interfaces = all
inet_protocols = all
mime_header_checks = regexp:/etc/postfix/header_checks
header_checks = regexp:/etc/postfix/header_checks
E o seguinte é meu arquivo master.cf :
#
# Postfix master process configuration file. For details on the format
# of the file, see the master(5) manual page (command: "man 5 master" or
# on-line: http://www.postfix.org/master.5.html).
#
# Do not forget to execute "postfix reload" after editing this file.
#
# ==========================================================================
# service type private unpriv chroot wakeup maxproc command + args
# (yes) (yes) (no) (never) (100)
# ==========================================================================
smtp inet n - y - - smtpd
#smtp inet n - y - 1 postscreen
#smtpd pass - - y - - smtpd
#dnsblog unix - - y - 0 dnsblog
#tlsproxy unix - - y - 0 tlsproxy
submission inet n - y - - smtpd
# -o syslog_name=postfix/submission
-o smtpd_tls_security_level=encrypt
-o smtpd_sasl_auth_enable=yes
-o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#smtps inet n - y - - smtpd
# -o syslog_name=postfix/smtps
# -o smtpd_tls_wrappermode=yes
# -o smtpd_sasl_auth_enable=yes
# -o smtpd_reject_unlisted_recipient=no
# -o smtpd_client_restrictions=$mua_client_restrictions
# -o smtpd_helo_restrictions=$mua_helo_restrictions
# -o smtpd_sender_restrictions=$mua_sender_restrictions
# -o smtpd_recipient_restrictions=
# -o smtpd_relay_restrictions=permit_sasl_authenticated,reject
# -o milter_macro_daemon_name=ORIGINATING
#628 inet n - y - - qmqpd
pickup unix n - y 60 1 pickup
cleanup unix n - y - 0 cleanup
qmgr unix n - n 300 1 qmgr
#qmgr unix n - n 300 1 oqmgr
tlsmgr unix - - y 1000? 1 tlsmgr
rewrite unix - - y - - trivial-rewrite
bounce unix - - y - 0 bounce
defer unix - - y - 0 bounce
trace unix - - y - 0 bounce
verify unix - - y - 1 verify
flush unix n - y 1000? 0 flush
proxymap unix - - n - - proxymap
proxywrite unix - - n - 1 proxymap
smtp unix - - y - - smtp
relay unix - - y - - smtp
# -o smtp_helo_timeout=5 -o smtp_connect_timeout=5
showq unix n - y - - showq
error unix - - y - - error
retry unix - - y - - error
discard unix - - y - - discard
local unix - n n - - local
virtual unix - n n - - virtual
lmtp unix - - y - - lmtp
anvil unix - - y - 1 anvil
scache unix - - y - 1 scache
#
# ====================================================================
# Interfaces to non-Postfix software. Be sure to examine the manual
# pages of the non-Postfix software to find out what options it wants.
#
# Many of the following services use the Postfix pipe(8) delivery
# agent. See the pipe(8) man page for information about ${recipient}
# and other message envelope options.
# ====================================================================
#
# maildrop. See the Postfix MAILDROP_README file for details.
# Also specify in main.cf: maildrop_destination_recipient_limit=1
#
maildrop unix - n n - - pipe
flags=DRhu user=vmail argv=/usr/bin/maildrop -d ${recipient}
#
# ====================================================================
#
# Recent Cyrus versions can use the existing "lmtp" master.cf entry.
#
# Specify in cyrus.conf:
# lmtp cmd="lmtpd -a" listen="localhost:lmtp" proto=tcp4
#
# Specify in main.cf one or more of the following:
# mailbox_transport = lmtp:inet:localhost
# virtual_transport = lmtp:inet:localhost
#
# ====================================================================
#
# Cyrus 2.1.5 (Amos Gouaux)
# Also specify in main.cf: cyrus_destination_recipient_limit=1
#
#cyrus unix - n n - - pipe
# user=cyrus argv=/cyrus/bin/deliver -e -r ${sender} -m ${extension} ${user}
#
# ====================================================================
# Old example of delivery via Cyrus.
#
#old-cyrus unix - n n - - pipe
# flags=R user=cyrus argv=/cyrus/bin/deliver -e -m ${extension} ${user}
#
# ====================================================================
#
# See the Postfix UUCP_README file for configuration details.
#
uucp unix - n n - - pipe
flags=Fqhu user=uucp argv=uux -r -n -z -a$sender - $nexthop!rmail ($recipient)
#
# Other external delivery methods.
#
ifmail unix - n n - - pipe
flags=F user=ftn argv=/usr/lib/ifmail/ifmail -r $nexthop ($recipient)
bsmtp unix - n n - - pipe
flags=Fq. user=bsmtp argv=/usr/lib/bsmtp/bsmtp -t$nexthop -f$sender $recipient
scalemail-backend unix - n n - 2 pipe
flags=R user=scalemail argv=/usr/lib/scalemail/bin/scalemail-store ${nexthop} ${user} ${extension}
mailman unix - n n - - pipe
flags=FR user=list argv=/usr/lib/mailman/bin/postfix-to-mailman.py
${nexthop} ${user}
Eu basicamente ativei sumbission .
O RainLoop se conecta ao meu servidor IMAP e ao servidor SMTP:
Contanto que "Usar autenticação" esteja desabilitado ou se eu usar a função mail(); do php, eu posso enviar e-mails e recebê-los em todos os lugares. Eles são marcados como spam, então eu descobri que preciso ativar a autenticação, mas se eu fizer isso; Não consigo enviar e-mails, isso é do meu arquivo mail.log :
# i replaced my server's public ip address with 127.0.0.1
Jun 23 05:14:57 mailserver dovecot: imap-login: Login: user=<shavit>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16305, TLS, session=<QVtwdek15swlOzfP>
Jun 23 05:14:57 mailserver postfix/smtpd[16306]: connect from mydomain.co.il[127.0.0.1]
Jun 23 05:14:57 mailserver postfix/smtpd[16306]: Anonymous TLS connection established from mydomain.co.il[127.0.0.1]: TLSv1.2 with cipher ECDHE-RSA-AES128-GCM-SHA256 (128/128 bits)
Jun 23 05:14:57 mailserver postfix/smtpd[16306]: warning: mydomain.co.il[127.0.0.1]: SASL CRAM-MD5 authentication failed: authentication failure
Jun 23 05:14:57 mailserver postfix/smtpd[16306]: disconnect from mydomain.co.il[127.0.0.1] ehlo=2 starttls=1 auth=0/1 quit=1 commands=4/5
Jun 23 05:14:57 mailserver dovecot: imap(shavit): Logged out in=11 out=401
Jun 23 05:14:57 mailserver dovecot: imap-login: Login: user=<shavit>, method=PLAIN, rip=127.0.0.1, lip=127.0.0.1, mpid=16310, TLS, session=<BsR2dek16MwlOzfP>
Jun 23 05:14:57 mailserver dovecot: imap(shavit): Logged out in=90 out=884
Meu certificado SSL é válido; Eu estou usando com nginx para 5 hosts virtuais sob o mesmo domínio e todos eles funcionam, então essa opção pode ser eliminada.
O que estou fazendo errado, ou; como eu consertaria isso? Ajuda seria apreciada!
A configuração do TLS é provavelmente um "red-herring". SASL CRAM-MD5 é atípico. Talvez você queira SASL PLAIN ou SASL LOGIN . Já que você está usando o dovecot para o IMAP, você pode querer usar o provedor sasl do dovecot para postfix também. link
Tags postfix