[Dovecot] Unresolved client rejection

[Timo Sirainen]

On ma, 2010-05-31 at 13:02 +0300, Greg Pearson wrote:

> would it be possible to prevent users who try to login from an 
> unresolved IP from connecting to Dovecot IMAP?

Sounds like a bad idea. There are legitimate users sometimes connecting
from IPs that don't have DNS names. And sometimes DNS is broken..

But I guess you could do it with tcpwrappers. That requires either
Dovecot v2.0 or patching
http://dovecot.org/patches/1.2/tcp-wrappers.patch