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Defect #31957

open

ActionMailer need to limit how many maximum connections it opens

Added by strhuan blomquist over 4 years ago. Updated about 2 months ago.

Status:
New
Priority:
Normal
Assignee:
-
Category:
Email notifications
Target version:
-
Start date:
Due date:
% Done:

0%

Estimated time:
Resolution:
Affected version:

Description

Microsoft office 365 smtp server has made some changes that will cause
this error message

Email delivery error: 432 4.3.2 STOREDRV.ClientSubmit; sender thread limit exceeded
basically

New throttling limit for concurrent connections that submit messages
The service has various limits to prevent abuse and to ensure fair use. An additional limit is being added. Under the new limit, up to three concurrent connections are allowed to send email messages at the same time. If an application tries to send more than three messages at the same time by using multiple connections, each connection will receive the following error message:

432 4.3.2 STOREDRV.ClientSubmit; sender thread limit exceeded

https://docs.microsoft.com/en-us/exchange/troubleshoot/send-emails/smtp-submission-improvements

other projects have worked around it by introducing a
maxConnections: 3 limitation to there mailers
ex

https://support.sisense.com/hc/en-us/community/posts/360029660673--Custom-SMTP-Email-Server-Solution-for-Outlook365-error-432-4-3-2-STOREDRV-ClientSubmit-sender-thread-limit-exceeded-

my setup

Environment:
Redmine version 4.0.2.stable
Ruby version 2.6.1-p33 (2019-01-30) [x86_64-linux]
Rails version 5.2.2
Environment production
Database adapter Mysql2
Mailer queue ActiveJob::QueueAdapters::AsyncAdapter
Mailer delivery smtp

Actions #1

Updated by Go MAEDA over 4 years ago

Could you try again after adding the following lines to config/additional_environment.rb?

config.active_job.queue_adapter =
  ActiveJob::QueueAdapters::AsyncAdapter.new \
    max_threads: 3
Actions #2

Updated by strhuan blomquist over 4 years ago

Thanks for the quick response.
so far this seems to have fixed it will keep track during the day.

Actions #3

Updated by strhuan blomquist over 4 years ago

The problem seems fixed so far. So there a way in the future to only make this affect the mailer. I guess this is now a global settings to any class that wants to use the ActiveJob::QueueAdapters::AsyncAdapter.

Actions #4

Updated by David Doležal over 2 years ago

Hi,
I found the same problem in new install of Redmine with Office 365 SMTP... Does Go MAEDA's solution help?

Actions #5

Updated by Christian Haeberli about 2 months ago

The same issue still occurs with version 5.1.1.

MAEDA's solution still works with this version.

It would be very helpful to mention this config/workaround on the EmailConfiguration Wiki:
https://www.redmine.org/projects/redmine/wiki/emailconfiguration

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