On 04/02/13 02:24, Matus UHLAR - fantomas wrote:
>> I set up one small VPS as an alternate outgoing mail server for those
>> times when our main mailservers gets blacklisted
>
> What do you mean by "outgoing" mail?
Mail in to this server via ports 587/465 and out to the rest of the world.
> The allowed ports only depend on your clients' mail configuration, if they
> only send mail using 587/submission, you don't need other ports open.
I guesss what I don't understand is that this server will "send" mail to
other mailservers from it's port 25 (I presume) so it needs to be open. I
just don't want any offsite incoming mail (not from our clients) coming
back through this server, ie; not used as a 2nd MX.
> Outlook up to 2007 (and Outlook Express until 6 I think) can only use SSL
> protocol which requires 465/ssl to be open (and this is the only/main reason
> why this port is being used in the world).
Thanks for that, it's never been clear to me why there are 2 ports.
> However: you don't need to have extra server, you can change outgoing IP on
> your mailserver by specifying SOURCE_ADDRESS= in ${ETC}/courier, if you get
> into problems. This means nobody has to change configuration of its client.
<blink> Really! I was unaware of this setting so maybe my Debian stable
version 0.65.0 does not have this setting. My configs do not have it although
they are probably up to 5 years old now.
Would you or Sam mind confirming when SOURCE_ADDRESS became available?
> Note that you MUST clear your problem and mail queue before you change your
> IP, otherwise you will only get your new IP banned.
Yep, done that. Just one client with a compromised password.
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