SMTP authentication is enabled on port 25

Hi All,

How to disable this : SMTP authentication is enabled on port 25 ?

THX,
Levi

I think Securing SMTP Services | Axigen Documentation might be what you’re looking for.

Thank you for your reply.
Yes I already setting all in SMTP Securing Documentation.
But this only improve secure connection, not disable login on port 25 and not solve this problem.
Now validate my server I have only one fault. Login on SMTP port enabled.

Please try to add an Acceptance / Routing rule (via WebAdmin > Security & Filtering > Acceptance & Routing > Advance Settings) that looks like below:

HTH,
Ioan

Thank you for your reply. I add your new Acceptance Rule but the SMTP auth enabled on port 25. See the validation message from https://xeams.com/validation.htm

THX,
Levente

I think your rule blocking auth on port 25.
But axigen’s response is an SMTP return code of 214 - the accepted commands include AUTH, so the result of the automatic authentication check is enabled on port 25. And actually the response to the incoming AUTH LOGIN as 504 AUTH type is not supported.
What do you think could be causing this?

Hello,

Recommended rule disabled AUTH on port 25 with or without StartTLS.

From your last message it is very clear that you get a 504 response when trying to use authentication (despite that it was not mentioned into the 250 banner sent after your EHLO command).

Presence of AUTH into the output of HELP command is totally harmless.

The answer on why the inboud test validator from Xeams is saying that authentication is enabled on port 25 could be provided only by them so my suggestion is to have a clarification session with them.

Note: It will be a good idea to have at hand your server logs from SMTP Incoming service, preferable set on Communication Protocol (check log lines containing SMTP-IN from the default log location /var/opt/axigen/log/{default,everything}.txt

HTH,
Ioan