For a mail relay server running only Postfix,
I am making an educated guess that the only potentially needed open ports would
be 25, 465, 587, and 2525
(According to
https://sectigostore.com/blog/what-is-a-secure-smtp-ssl-port-heres-what-to-know-about-smtp-security/)
No need to open imap(s) and/
For the smtp, you only need 25. 465 is smtps and 587 submission - sub.
2525 is not needed either.
For pure relay the 25 is the only port you need, external mailservers
will not relay to any other port, unless specifically configured.
Josef
On Tue, Mar 8, 2022 at 1:54 PM White, Daniel E. (GSFC-770
Many thanks for the sanity check
From: Josef Vybíhal
Date: Tuesday, March 8, 2022 at 08:07
To: Daniel White
Cc: "postfix-users@postfix.org"
Subject: [EXTERNAL] Re: Firewall Ports
For the smtp, you only need 25. 465 is smtps and 587 submission - sub.
2525 is not needed either.
For pure relay th
On 2022-03-08 06:53, White, Daniel E. (GSFC-770.0)[NICS] wrote:
For a mail relay server running only Postfix,
I am making an educated guess that the only potentially needed open
ports would be 25, 465, 587, and 2525
25: all mail exchange is exclusively done with connections to port 25
465: s
Hi,
Can you please confirm that postfix creates a file from each and every
email at least once?
I'm asking this because we have to switch to McAfee AV and my plan is to
use it's on-access-scan feature to scan the emails.
If postfix really creates a file at least once of each email then thi
Hi,
There is no dovecot.
This is a relay server and there are security constraints that must be
follow.
Zs.
On 2022-03-08 16:07, Jeroen Geilman wrote:
This is a very bad idea; google "mailscanner postfix" for why.
Instead, scan your mailboxes after delivery, dovecot has hooks for
this.
If t
On 2022-03-08 15:57, Zsombor B wrote:
Can you please confirm that postfix creates a file from each and every
email at least once?
incorrect question leads to incorrect answer
I'm asking this because we have to switch to McAfee AV and my plan is
to use it's on-access-scan feature to scan the
Zsombor B:
> Hi,
>
>
> Can you please confirm that postfix creates a file from each and every
> email at least once?
>
> I'm asking this because we have to switch to McAfee AV and my plan is to
> use it's on-access-scan feature to scan the emails.
>
> If postfix really creates a file at least
On Tue, Mar 08, 2022 at 03:57:50PM +0100, Zsombor B wrote:
> Can you please confirm that postfix creates a file from each and every
> email at least once?
Postfix queue files are in an undocumented internal format, and virus
scanners at the filesystem level are not appropriate for scanning the
P
Dnia 8.03.2022 o godz. 15:57:50 Zsombor B pisze:
>
> Can you please confirm that postfix creates a file from each and
> every email at least once?
>
> I'm asking this because we have to switch to McAfee AV and my plan
> is to use it's on-access-scan feature to scan the emails.
>
> If postfix re
Just for the record:
I have been able to narrow it down to socketfilterfw (macOS Application
Firewall).
Basically, where it was working OK in macOS Mojave (and so I did not suspect
anything — wrong), it turns out to be a real dog in Monterey. In terms of what
happens, there is completely no m
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