On 06.02.22 11:07, Forums wrote:
From what I had been told and what I could read, port 465 is deprecated and I had to use port 587. So for outgoing emails I use port 587.

it was "deprecated" (not really standardised) for ~20 years, since RFC 2476
(December 1998) was introduced, but last 4 years it's even recommended:
RFC 8314 (January 2018)

There may be subtle differences, but still, 465 and 587 have de facto same
usage and therefore should have same . Of course you may set different
policies in your company/network/server, I just don't recommend it.

For "local" emails (accounts used by my private servers) I use port 25 to send because these accounts do not send to external email and are redirected to my personnal account. Only 4 email accounts are used to send/receive emails form/to external emails.

since port 25 is used for server-(mx) server traffic, it can be used for
spam sending, so different ISPs often block outgoing connections to port 25,
and recommend using ports above where authentication should be mandatory.

smtpd_milters = inet:localhost:12345
what does this do?

It's used by opendkim.

aha. amavis can do DKIM too, but it's your decision where to do it.


I put disclaimer filter directive under "submission" line in master.cf and keep "postscreen":

smtp      inet  n       -       y       -       1 postscreen

[...]

submission inet  n       -       y       -       -       smtpd
        -o content_filter=disclaimer:

are you aware that submission only applies to mail submitted via port 587?
It's seems yes but not sure.


I mean, this way mail sent via port 587 will only be run through your
disclaimer, the rest (25 465) only through amavis.
I'm asking if this is what you wanted.



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