Hi there,
Using Postfix 3.5.6, only one IP per postfix instance, I have an issue with
a specific Mailbox Provider limiting to 3 ingoing connections per IP.
Here is my setup for this Mailbox Provider for outgoing connections to this
provider :
In master.cf :
*#
==========================================================================#
service type private unpriv chroot wakeup maxproc command + args#
(yes) (yes) (yes) (never) (100)#
==========================================================================transport
unix - - y - 3 smtp*
In main.cf :
*# Transport policytransport_initial_destination_concurrency =
1transport_destination_concurrency_limit =
3transport_destination_rate_delay = 0transport_destination_recipient_limit
= 2*
Also, in main.cf, I have these settings :
*smtp_connection_cache_on_demand = yessmtp_tls_connection_reuse =
yessmtp_connection_reuse_time_limit = 300ssmtp_connection_reuse_count_limit
= 99smtp_connection_cache_time_limit = 2s*
I am receiving a lot of deferred messages from this Mailbox Provider : *Too
many connections from your IP*...
This kind of deferred message is happening when postfix is closing a
connection and reopening a new one. It seems that my delay to close the
connection and open a new one is much more shorter than the Mailbox
Provider to see that the connection has been closed, so he sees 4
connections and starts deferring messages.
Is there a way to implement a delay between connection closing and
reopening for a specific transport in Postfix, while still using connection
reuse ?
Regards,
--
Yves-Marie LE PORS-CHAUVEL
Email Product Manager
*T: +33 2 23 45 57 99* (3043)
23, rue du Bignon - 35 135 Chantepie
www.ccmbenchmark.com
