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...
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<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>