[Dovecot] dnsbl feature for dovecot

[Timo Sirainen]

On 3.7.2013, at 4.21, John Fawcett <john.ml at erba.tv> wrote:

> dnsbl's are a popular method to prevent listed ips from making
> connections to mta software.
> 
> cf. postscreen_dnsbl_sites in postfix
> 
> Would it be possible to introduce such a feature in dovecot, so that
> connections can be denied
> based on a dnsbl lookup (where the precise dnsbls used are configurable)?

You're talking about IMAP/POP3 connections?

Possible, yeah .. possibly even without code changes by using tcpwrappers.