Marcel Grandemange wrote:
I have a server that has one real ip and a virtual second ip.
Both are connected to the same isp but have different addresses.
The plan was one is used for all normall traffic but the second only for
mail.
This is not working so,
smtp_bind_address = 196.211.117.44
http://www.postfix.org/postconf.5.html#smtp_bind_address
when a user sends mail postfix uses the main ip
address to send from, this creates an issue as there is someone on the
internal network running there own smtp server and sending spam.
so you host a miscreant and all you found is to evade? block or die.
This results in the main address being blacklisted and our mail server as
well.
If postfix could simply send mail from the virtual address our issues would
be solved as main interface can be blacklisted and wont effect our mail
server.
and this will help how? the spammer will still continue his operation.
and if nothing is done, and at some time, your whole network will be
blocked, and your name (domain, company, ...) will be associated with spam.
