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 at cyberfusion.nl ? ----- Original Message ----- From: Marc Roos (M.Roos at f1-outsourcing.eu) Date: 12/11/19 18:59 To: dovecot (dovecot at dovecot.org), wedwards (wedwards at 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 at 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 at cyberfusion.nl <https://cyberfusion.nl/img/CF-Logo-liggend-RGB.png>
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 at cyberfusion.nl ? ----- Original Message ----- From: Marc Roos (M.Roos at f1-outsourcing.eu) Date: 12/11/19 18:59 To: dovecot (dovecot at dovecot.org), wedwards (wedwards at 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 at 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 at cyberfusion.nl <https://cyberfusion.nl/img/CF-Logo-liggend-RGB.png>
Atomia
2019-Dec-11 18:14 UTC
Ticket Received - [#22079] RE: Re[2]: Lightweight LMTP daemon to avoid overkill MTA
Hi Claudio Corvino via dovecot, We have received your request and a ticket has been created with Ticket ID - 22079. A support representative will be reviewing your request and will contact you shortly. To view the status of the ticket or add comments, please visit? https://support.atomia.com/helpdesk/tickets/22079 Speak to you soon, Atomia Support Team -------------- next part -------------- An HTML attachment was scrubbed... URL: <https://dovecot.org/pipermail/dovecot/attachments/20191211/c6fa66c6/attachment.html>
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 at cyberfusion.nl ? ----- Original Message ----- From: Marc Roos (M.Roos at f1-outsourcing.eu) Date: 12/11/19 19:14 To: dovecot (dovecot at dovecot.org), wedwards (wedwards at 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 at cyberfusion.nl ----- Original Message ----- From: Marc Roos (M.Roos at f1-outsourcing.eu) Date: 12/11/19 18:59 To: dovecot (dovecot at dovecot.org), wedwards (wedwards at 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 at 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 at cyberfusion.nl <https://cyberfusion.nl/img/CF-Logo-liggend-RGB.png>
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