Unable to connect to IMAP - Exceeded Maximum Number of Connections

Hi all, The mail server is an old Postfix/Cyrus stack. I access emails from 4 different Thunderbird clients using either VPN or SSH port forwarding which gives up to 8 combinations in total. When switching I often see: "Unable to connect to your IMAP server. You may have exceeded the maximum

Re: Unable to connect to IMAP - Exceeded Maximum Number of Connections

On Wed, Jun 23, 2021 at 10:36:49AM +0100, Adam Weremczuk wrote: > "Unable to connect to your IMAP server. > You may have exceeded the maximum number of connections to this server. > If so use the Advanced IMAP Server Settings dialog to reduce the number of > cached connections." Postfix does not s

Re: Unable to connect to IMAP - Exceeded Maximum Number of Connections

On Wed, Jun 23, 2021 at 11:43:32AM +0200, Bastian Blank wrote: > On Wed, Jun 23, 2021 at 10:36:49AM +0100, Adam Weremczuk wrote: > > "Unable to connect to your IMAP server. > > You may have exceeded the maximum number of connections to this server. > > If so use the Advanced IMAP Server Settings di

SPF guidance

Hi, I've set up postfix to use policyd-spf using python-policyd-spf and have some questions. Hopefully this isn't off-topic, as my search returns results from only many years ago. Is this still the best SPF policy service for postfix integration on Linux? smtpd_recipient_restrictions = ...

Re: SPF guidance

Alex: I've set up postfix to use policyd-spf using python-policyd-spf and have some questions. Hopefully this isn't off-topic, as my search returns results from only many years ago. Is this still the best SPF policy service for postfix integration on Linux? You can verify SPF using a policy ser

Re: SPF guidance

On 2021-06-23 at 12:00:39 UTC-0400 (Wed, 23 Jun 2021 18:00:39 +0200) David Bürgin is rumored to have said: Alex: I've set up postfix to use policyd-spf using python-policyd-spf and have some questions. Hopefully this isn't off-topic, as my search returns results from only many years ago. Is th

Question about separate MTA and MDA servers and how to get them communicating properly

Given a pair of postfix instances, one "out front" to be a relay (MTA), the other "behind" to host mailboxes (MDA) How do we get the MTA to relay incoming mail to the MDA ? SMTP or LMTP or …? Mail sent to the MTA is looking for a "local recipient". Then the same question for outgoing mail from

Re: Question about separate MTA and MDA servers and how to get them communicating properly

> > > Our dilemma is that most online tutorials and how-to's have everything on > one server. > I'd start with http://www.postfix.org/STANDARD_CONFIGURATION_README.html#firewall

Re: Question about separate MTA and MDA servers and how to get them communicating properly

On 2021-06-23 at 17:28:22 UTC-0400 (Wed, 23 Jun 2021 21:28:22 +) White, Daniel E. (GSFC-770.0)[NICS] is rumored to have said: Given a pair of postfix instances, one "out front" to be a relay (MTA), the other "behind" to host mailboxes (MDA) How do we get the MTA to relay incoming mail to

Re: Question about separate MTA and MDA servers and how to get them communicating properly

White, Daniel E. (GSFC-770.0)[NICS]: > Given a pair of postfix instances, one "out front" to be a relay (MTA), the > other "behind" to host mailboxes (MDA) > > How do we get the MTA to relay incoming mail to the MDA ? SMTP or LMTP or ?? > Mail sent to the MTA is looking for a "local recipient".

Transport table matching

Hello! First of all, I apologize if my question is somewhat flawed formally or semantically (it may be excessively stupid without me realizing, for example), I have searched for the answer myself without success, and only after failing, I am submitting my problem here as a last resort. My qu