On 18.04.24 12:22, Sebastian Arcus via mailop wrote:
I am not blocking outbound 587. I usually take the view that some user
devices - such as smartphones - could be configured to retrieve and
send email for their personal email accounts - and need to talk to
other email hosting providers. My setups are fairly small, and a
certain level of flexibility is expected in allowing users
functionality which other large setups might restrict.
However, if keeping outbound port 587 open turns out to be causing
real headaches, I could take a look at revising the existing approach.
you would block many users from sending mail using other companies, I don't
recommend doing that - maybe as last resort.
second possibly problematic port is 465, but the same applies there.
listening to abuse reports might help, if you log all NAT, so you can
track every abuse to its source.
--
Matus UHLAR - fantomas, uh...@fantomas.sk ; http://www.fantomas.sk/
Warning: I wish NOT to receive e-mail advertising to this address.
Varovanie: na tuto adresu chcem NEDOSTAVAT akukolvek reklamnu postu.
Linux is like a teepee: no Windows, no Gates and an apache inside...
_______________________________________________
mailop mailing list
mailop@mailop.org
https://list.mailop.org/listinfo/mailop
