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2answers
82 views

Exchange 2007: relay only from selected servers based on rDNS

I'm looking for a way to make Exchange 2007 only accept mail from a certain group of hosts. These hosts all use the same identifying rDNS entry. Exchange 2003 uses a whitelist based on the reverse ...
0
votes
2answers
321 views

Qmail: relay only from selected servers based on rDNS

I'm looking for a way to disable Qmail relaying for everyone, but allow one certain group of hosts to do so. These hosts all use the same identifying rDNS entry. In Exchange 2003, Postfix, Exim and ...