SOLVED SMTP emails not being sent with defined domain?

[Daisuke]

Edit: I created NAS-119145.
Update: The issue is now fixed in Bluefin 22.12-RC.1.

There is a strange behaviour with emails being sent with SMTP method. If I define the hostname uranus.lan, everything is functional. However this breaks the mDNS authentication in a Mac.

Hostname is not correctly defined:

Code:

# cat /etc/resolv.conf
nameserver 192.168.1.1
# hostname
uranus.lan
# hostname -f
uranus.lan.

# cat /var/log/mail.log
# echo 'This is a test.' | mail -s 'Hello World' hello@domain.com
Nov 26 02:50:45 uranus middlewared[1086]: sending mail to hello@domain.com
Content-Type: multipart/mixed
MIME-Version: 1.0
Subject: Hello World
From: Uranus <mail@icloud.com>
To: hello@domain.com
Date: Sat, 26 Nov 2022 07:50:44 -0000
Message-ID: <truenas-20221126.075044.617651.b'-jhK'@uranus.lan>
Content-Transfer-Encoding: 8bit
X-Mailer: TrueNAS
X-TrueNAS-Host: uranus.lan

X-TrueNAS-Host had the correct hostname, emails work.

If I define correctly the hostname, mDNS authentication is fixed, but emails are not being sent anymore.

Hostname correctly defined, mDNS okay, emails broken:

Code:

# cat /etc/resolv.conf
domain lan
nameserver 192.168.1.1
# hostname
uranus
# hostname -f
uranus.lan

# echo 'This is a test.' | mail -s 'Hello Broken' hello@domain.com
# cat /var/log/mail.log
Nov 26 02:59:12 uranus middlewared[1086]: sending mail to hello@domain.com
Content-Type: multipart/mixed
MIME-Version: 1.0
Subject: Hello Broken
From: Uranus <mail@icloud.com>
To: hello@domain.com
Date: Sat, 26 Nov 2022 07:59:10 -0000
Message-ID: <truenas-20221126.075910.998769.b'U1UN'@uranus>
Content-Transfer-Encoding: 8bit
X-Mailer: TrueNAS
X-TrueNAS-Host: uranus

As you can see, X-TrueNAS-Host is not looking for the full hostname as it should, which makes the email to fail being sent.

 

[Daisuke]

Edit: I created NAS-119145.

The issue is now fixed in Bluefin 22.12-RC.1.