Maybe nice to share some details?
-----Original Message----- To: Marc Roos; dovecot Subject: Re[4]: Lightweight LMTP daemon to avoid overkill MTA
I ended up 'hacking' LMTP support into the external spam filter. Someone else already contributed 'real' patches to implement LMTP support, so once I go live with this mail platform it should be stable.
Met vriendelijke groeten,
William Edwards T. 040 - 711 44 96 E. wedwards@cyberfusion.nl
----- Original Message ----- From: Marc Roos (M.Roos@f1-outsourcing.eu) Date: 12/11/19 19:14 To: dovecot (dovecot@dovecot.org), wedwards (wedwards@cyberfusion.nl) Subject: RE: Re[2]: Lightweight LMTP daemon to avoid overkill MTA
Yes I am running sendmail next to dovecot on backend servers. That works ok. I have some problems with re-routing mail in a proxy setup.
-----Original Message----- To: Marc Roos; dovecot Subject: Re[2]: Lightweight LMTP daemon to avoid overkill MTA
Hi,
I was unclear in my question. The spam filter is only able to deliver mail over SMTP, not over LMTP.. So I would still need some kind of daemon that listens for SMTP and then offers incoming email to Dovecot's LMTP socket.
Met vriendelijke groeten,
William Edwards T. 040 - 711 44 96 E. wedwards@cyberfusion.nl
----- Original Message ----- From: Marc Roos (M.Roos@f1-outsourcing.eu) Date: 12/11/19 18:59 To: dovecot (dovecot@dovecot.org), wedwards (wedwards@cyberfusion.nl) Subject: RE: Lightweight LMTP daemon to avoid overkill MTA
Yes dovecot, /etc/dovecot/conf.d/20-lmtp.conf ;)
service lmtp { chroot = client_limit = 1 drop_priv_before_exec = no executable = lmtp extra_groups = $default_internal_group group = idle_kill = 0 inet_listener lmtp { address = haproxy = no port = 24 reuse_port = no ssl = no } privileged_group = process_limit = 0 process_min_avail = 0 protocol = lmtp service_count = 0 type = unix_listener lmtp { group = mode = 0666 user = } user = vsz_limit = 18446744073709551615 B }
-----Original Message----- To: dovecot@dovecot.org Subject: Lightweight LMTP daemon to avoid overkill MTA
Hi,
My situation is as follows.
-An internet-facing spam filter relays email to destination mail server (Dovecot) with SMTP.
- Dovecot should take email and deliver it to user's mailboxes. I guess I'd need LMTP for this.
- An external SMTP relay is already in place. I am thinking of using Dovecot submission to relay to the external relaying cluster.
So, both relaying and routing are done externally - the Dovecot machine should only store mail. Of course, there should also be a mechanism that takes care of local delivery to Dovecot, like LMTP. Usually, I would use an MTA like Exim to take care of local delivery. I feel like a fully-featured MTA is overkill, though, as all other roles such an MTA would fulfill - relaying and spam filtering - are fulfilled on external servers.
Q: Does anyone know of a lightweight LMTP daemon that can take care of local delivery to Dovecot without the need for a full MTA?
With kind regards,
William Edwards T. 040 - 711 44 96 E. wedwards@cyberfusion.nl