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I have a postfix server currently relaying all mails to our ISP
mailsserver. As we had a crash in one of our big services, our ISP
mailserver saw this extensivated traffic as spam (due to reputaions based
filtering) and blacklisted my postfix relayhost...:-(!
I have double-checked that we are not spamming, and we are only sending to
internal or "known" vendor emails.
As 99,96% of all our mail is to internal users (*@internal_mail.com), I
would like to relay these directly to our official mailserver, and still
keep relaying external mails (anything but *@internal_mail.com) to our ISP
Is it possible to do this in postfix, or can I only have 1 relayhost
configured at a time ?
If possible - how can this be done.
Thanks in advance :-) !