valid_from_domain test and the null sender

[widomaker]

Hello,

We use Magicspam (1.0.6-1.3) for Plesk 11.0.9 with Postfix on CentOS 6.4.

Is the "valid_from_domain" test intended to also reject mail from the null sender in addition to invalid domains? As I understand it, that violates RFCs, so I wanted to confirm that this is the intended behavior. I noticed that this happened when I received complaints of rejected mail to a server that uses sender callbacks (with a null sender)...

The mail system

<user1@first.example.com>: host
first.example.com[0.0.0.1] said: 550-Verification failed
for
<user2@second.example.com> 550-Called: 0.0.0.2 550-Sent:
RCPT TO:<user2@second.example.com> 550-Response: 550 5.7.0 550 Mail
from domain [unknown] is missing A or MX DNS record. See
http://www.linuxmagic.com/best_practices/valid_from_domain.html for more
information. Protection provided by MagicSpam 1.0.6-1.3
http://www.magicspam.com 550 Sender verify failed (in reply to RCPT TO
command)

[magicspam]

Hello,

Thank you for your post! The valid_from_domain rule shouldn't hit on "null" sender addresses as these are supposed to be bounce messages:

MAIL FROM: <>

We think in this case that the MAIL FROM address isn't quite right. The valid_from_domain rule only checks to make sure the domain portion of the from-address is valid (e.g: "localhost" isn't allowed).

If you respond with a sample MagicSpam log file we would be able to give you more details (feel free to remove any sensitive data, but we will need to see the FROM address).

Thanks!
-- MagicSpam Support Team --


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