Postfix blocks Mailman if too many invalid addresses are on the list

[Christian Recktenwald]

Hi,

I have postfix, mailman and an imap service running on one mail server.

Problem is, every couple of months several dozens of list
member mail boxes expire. If in this case mailman tries to
deliver a posting it gets many errors concerning unknown users
*and* terminates the smtp session due too many failures.

This causes trouble because mail addresses listed on the list
after the smtp connection hit the limit of acceptable invalid
rcpts per connection will never get their mail.

So I need a way to just switch this session terminating off
or to set the limit of acceptable invalid recipients to
a higher value.

(Sure one could think of some better work flow
but the guys running the mailing list and user base
have their own opinion on what's to be changed here.)

TIA, Chris

--
Christian Recktenwald      
postfix-users-dist@...            

[Noel Jones-2]

On 11/2/2009 8:18 AM, Christian Recktenwald wrote:

> Hi,
>
> I have postfix, mailman and an imap service running on one mail server.
>
> Problem is, every couple of months several dozens of list
> member mail boxes expire. If in this case mailman tries to
> deliver a posting it gets many errors concerning unknown users
> *and* terminates the smtp session due too many failures.
>
> This causes trouble because mail addresses listed on the list
> after the smtp connection hit the limit of acceptable invalid
> rcpts per connection will never get their mail.
>
> So I need a way to just switch this session terminating off
> or to set the limit of acceptable invalid recipients to
> a higher value.
>
> (Sure one could think of some better work flow
> but the guys running the mailing list and user base
> have their own opinion on what's to be changed here.)
>
> TIA, Chris
>

Arrange for mailman to use a port other than 25 for submitting
mail, and increase the error count on that port in postfix's
master.cf

An example using the submission port 587

# master.cf
submission  inet  n  -  n  -  -  smtpd
   -o syslog_name=postfix-submission
   -o smtpd_hard_error_limit=1000
   -o smtpd_soft_error_limit=1000


   -- Noel Jones

[Christian Recktenwald]

On Mon, Nov 02, 2009 at 08:58:46AM -0600, Noel Jones wrote:
> An example using the submission port 587
>
> # master.cf
> submission  inet  n  -  n  -  -  smtpd
>   -o syslog_name=postfix-submission
>   -o smtpd_hard_error_limit=1000
>   -o smtpd_soft_error_limit=1000

Works, thanks :-)

--
Christian Recktenwald      
postfix-users-dist@...