Dovecot wiki LMTP description

Fernando Maule fernando.maule at
Fri Nov 14 14:31:00 UTC 2014

Hello Ron,

On 14/11/2014 15:15, Ron Leach wrote:
> Does this example mean that LMTP will only listen for input messages 
> from the interface with IP address (plus localhost)?  If 
> so, I probably haven't understood how LMTP is intended to work.  Is 
> there a reason why we want to limit LMTP to listening for messages 
> from a specific IP on the network?  I need to understand that so that 
> I replace ...24 with a suitable host interface that exists on our LAN 
> (we don't have a host at

No, it *listens* on that addresses (port 24)
LMTP is intended for local mail transfer.
The best way to use it, if dovecot LDA and MTA are on the same machine, 
is to use a unix socket like this (example for postfix):

service lmtp {
   unix_listener /var/spool/postfix/private/dovecot-lmtp {
         group = postfix
         mode = 0600
         user = postfix

if you prefer to use an inet listener, do it only for the needed 
addresses (not public / internet faced ones) or reject unauthorized 


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