[MM3-users] Re: Cannot start lmtp runner due to error while attempting to bind on address ('127.0.0.1', 8024): address already in use

On 12/2/19 5:04 AM, actionmystique@gmail.com wrote:

Of course the port is already in use: it is used by dovecot.

tcp6       0      0 ::1:8024                :::*                    LISTEN      0          1317360    129620/dovecot      
tcp        0      0 127.0.0.1:8024          0.0.0.0:*               LISTEN      0          1316324    129620/dovecot      

I must be missing something.

What is Dovecot listening for on the lmtp port?

If this is Postfix communicating with Dovecot as the LDA or for address verification and using TCP port 8024, you have at least two choices. You can have Postfix/Dovecot communicate via a unix socket instead or you can configure Mailman to use a different port. See <https://mailman.readthedocs.io/en/latest/src/mailman/docs/mta.html> which says in part:

lmtp_port is fairly arbitrary (there is no standard port for LMTP). Use any port convenient for your site. “8024” is as good as any, unless another service is using it.

-- Mark Sapiro <mark@msapiro.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan