I’m setting up my first mail server.
I’ve installed Postfix, configured a few options, and can send mail
successfully. I have two addresses, one IPv4 and one IPv6, and I’ve set up
my SPF record to my IPv4, which is the one I’d like to use to send emails.
The problem is that Postfix refuses to send emails from that IPv4 address
alone, instead choosing to send email from my IPv6 address about half the
time. In main.cf, I’ve tried every relevant combination of
smtp_bind_address, smtp_bind_address6, inet_interfaces, and mynetworks that
I can think of. I’ve also tried setting smtp_bind_address in master.cf as
described here: http://www.postfix.org/postconf.5.html#smtp_bind_address. I
also followed the debugging instructions
(http://www.postfix.org/DEBUG_README.html) to the best of my ability, but
I’m afraid I tapped out when I got to the “tracing the program” steps; I
just don’t have the requisite C ability.
System: Debian Stable, Postfix version 2.11.3-1
Here’s the output from postconf -n, almost stock configuration.
alias_database = hash:/etc/aliases
alias_maps = hash:/etc/aliases
append_dot_mydomain = no
biff = no
config_directory = /etc/postfix
html_directory = /usr/share/doc/postfix/html
inet_interfaces = all
mailbox_size_limit = 0
mydestination = AAAAAAAAAAA.com, jupiter, localhost.localdomain, localhost
myhostname = AAAAAAAAAAAA.com
mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128
myorigin = /etc/mailname
readme_directory = /usr/share/doc/postfix
recipient_delimiter = +
relayhost =
smtp_bind_address = D.DDD.DDD.DDD
smtp_tls_session_cache_database = btree:${data_directory}/smtp_scache
smtpd_banner = $myhostname ESMTP $mail_name (Debian/GNU)
smtpd_relay_restrictions = permit_mynetworks permit_sasl_authenticated
defer_unauth_destination
smtpd_tls_cert_file = /etc/pki/AAAAAAAAAAA.com/cert.pem
smtpd_tls_key_file = /etc/pki/AAAAAAAAAAA.com/privkey.pem
smtpd_tls_session_cache_database = btree:${data_directory}/smtpd_scache
smtpd_use_tls = yes
Here’s an excerpt from /var/log/mail.log:
Apr 25 20:39:49 jupiter postfix/pickup[13113]: XXXXXXXXXX: uid=0
from=<jupi...@aaaaaaaaaaa.com>
Apr 25 20:39:49 jupiter postfix/cleanup[24947]: XXXXXXXXXX:
message-id=<xxxxxxxxxxxx.xxxxxx...@aaaaaaaaaaa.com>
Apr 25 20:39:49 jupiter postfix/qmgr[13114]: XXXXXXXXXX:
from=<aaa...@aaaaaaaaaaa.com>, size=361, nrcpt=1 (queue active)
Apr 25 20:39:50 jupiter postfix/smtp[24950]: XXXXXXXXXX:
to=<aaaaaa...@gmail.com>, relay=gmail-smtp-in.l.google.com[DD.DD.DD.DD]:25,
delay=1.1, delays=0.12/0.02/0.18/0.78, dsn=2.0.0, status=sent (250 2.0.0 OK
1493145588 xxxxxxxxxxxxxxx.57 - gsmtp)
Apr 25 20:39:50 jupiter postfix/qmgr[13114]: XXXXXXXXXX: removed
Can this even be made to work?
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