Postfix sends as hostname.domain.com instead of domain.com
Solution 1
On debian, the default sender's domain used is specified by /etc/mailname
. AFAIK this is a Debian specific modification to postfix.
So it should be solved by filling /etc/mailname
with mydomain.com
. And myorigin
in postfix defaults to /etc/mailname
on debian, which also should be used in my opinion (so just delete this line).
Solution 2
I'm on Ubuntu 14.04 and I have exactly the same symptom as yours. But my problem is resolved by specifying a "From:" header explicitly, e.g.
mail -aFrom:[email protected] ...
If the -a option is missed in above command, there will be the exact symptom as yours.
BTW, I use mailutils version 1:2.99.98-1.1 amd64
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Mutt
Updated on September 18, 2022Comments
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Mutt over 1 year
I've been trying to set up a debian mail server running postfix, but when I try to send mail via
mail [email protected]
the recipient sees the sender as hostname.domain.com. The hostname it sends does not have an A or MX record set up to it, it is just the /etc/hostname. I can manually set the sender to [email protected] if I send by logging in viatelnet localhost 25
.my main.cf
myorigin = mydomian.com myhostname = mail.mydomain.com mydestination = mail.mydomain.com, mydomain.com, localhost, localhost.localdomain relayhost = mynetworks = 127.0.0.0/8 [::ffff:127.0.0.0]/104 [::1]/128 mailbox_size_limit = 0 recipient_delimiter = + inet_interfaces = all alias_maps = hash:/etc/aliases alias_database = hash:/etc/aliases smtpd_tls_cert_file=/etc/ssl/certs/mailcert.pem smtpd_tls_key_file=/etc/ssl/private/mail.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 smtpd_tls_security_level=may smtpd_tls_protocols = !SSLv2, !SSLv3 local_recipient_maps = proxy:unix:passwd.byname $alias_maps
and mail.log when I send out an email
Aug 3 06:28:51 hostname postfix/pickup[7047]: 4D5432023A: uid=1000 from=<user@hostname> Aug 3 06:28:51 hostname postfix/cleanup[7065]: 4D5432023A: message-id=<[email protected]> Aug 3 06:28:51 hostname postfix/qmgr[7048]: 4D5432023A: from=<[email protected]>, size=339, nrcpt=1 (queue active) Aug 3 06:28:52 hostname postfix/smtp[7067]: 4D5432023A: to=<[email protected]>, relay=mail.destinationserver.com[IP]:25, delay=1.4, delays=0.11/0.01/0.49/0.78, dsn=2.0.0, status=sent (250 Queued (0.110 seconds)) Aug 3 06:28:52 hostname postfix/qmgr[7048]: 4D5432023A: removed
I've tried setting
masquerade_domains = mydomain.com
but it gets flagged as spam in thunderbird and gmail when I do this.Headers from a message sent by my server:
Return-Path: [email protected] Received: from mail.mydomain.com (DESTINATION [127.0.0.1]) by mail.destination.com ; Sun, 3 Aug 2014 08:10:06 +0200 Received: by mail.mydomain.com (Postfix, from userid 1000) id 6D7A68033A; Sun, 3 Aug 2014 08:10:27 +0200 (CEST) To: <[email protected]> Subject: test X-Mailer: mail (GNU Mailutils 2.99.97) Message-Id: <[email protected]> Date: Sun, 3 Aug 2014 08:10:27 +0200 (CEST) From: [email protected] fdsa
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sebix almost 10 yearsCan you post the headers of an outgoing mail with wrong domain as sender? It is not exactly clear to me which name/domain you mean.
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sebix almost 10 yearsOh, and what's in your
/etc/mailname
, as you are on debian? -
Mutt almost 10 years@sebix my /etc/mailname is mail.mydomain.com. I've added the headers into the body.
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sebix almost 10 yearsWhat happens if you comment out
myorigin
inmain.cf
, set/etc/mailname/
tomydomain.com
and restart postfix? Additionally: You mention bothhostname.mydomain.com
andmail.domain.com
, can you elaborate on what are the differences and purposes of these two domains? -
Mutt almost 10 years@sebix I have no idea why, but changing
/etc/mailname
frommail.mydomain.com
tomydomain.com
fixed it! To answer your questionhostname.mydomain.com
does not have a purpose (or an A record), this is the first machine I have tried to run both a web and mail server on so I didn't want to make the hostname mail like I would've in the past if it was just a mail server.mail.mydomain.com
has A and MX records on it. Thank you so much for your help, I spent 6 hours tearing my hair out on this! -
Avamander about 7 yearsFor me the
masquerade_domains = $mydomain
worked. No flagging as spam. It was easier to fix the cause of the false flagging than the annoying@host.domain.tld
.
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Raphaël Ponthieu over 7 yearsThis works on ubuntu 16.04 however there must be some main.cf variable instead ? anyone ?