Email Queue Runtime

[rafael.martinez]

Hello,

I have a VPS from there I send emails to my clients and suppliers, I realized that when I send emails to my office 365 clients and suppliers, it shows me the following message:

": 452 4.5.3 Too many recipients (AS780090) [MW2NAM10FT007.eop-nam10.prod.protection.outlook.com 2023-04-20T15:11:09.315Z 08DB40984FA09E4A]"

Everything indicates that Microsoft has limited me in the number of recipients that I can send, for example if I send an email to 4 recipients it only sends 2 and the other 2 remain in the queue, then when I run the queue manually these 2 emails leave.

The only way I see to solve this is that the queue runs automatically every so often, is there a way to assign a run time to the email queue?

 

[ffeingol]

Exim automatically tries to send all the email in the queue. The time that waits to re-try depend on how long the mail is in the queue.

 

[rafael.martinez]

Can I change the time for the queue to run, for example every 20 seconds?

 

[cPRex]

I'm not sure every 20 seconds is a good idea. That would likely just get you ratelimited at various providers. Details on how you can adjust this can be found here:

https://support.cpanel.net/hc/en-us/articles/1500002034182-Where-can-I-modify-Exim-s-retry-rules-

 

[rafael.martinez]

Thanks for the update.

Could you confirm within "Advanced Exim Configuration Manager" in which option I can change the time in which the email queue is reloaded?

 

[cPRex]

It's the very last section of the page - if you scroll all the way down you'll see the "Section: RETRYBLOCK" that shows the current settings.

 

[rafael.martinez]

Thanks for the update.

Going to Section: RETRYBLOCK" I see the following:

+secondarymx * F,4h,5m; G,16h,1h,1.5; F,4d,8h
* * F,2h,15m; G,16h,1h,1.5; F,4d,8h

How do I change it to run every 20 seconds?

 

[cPRex]

I still think this is not a good way to resolve the issue, and that you should break up your emails to have fewer recipients. However, details on how to adjust the retry settings can be found here:

32. Retry configuration

Exim is a message transfer agent (MTA) developed at the University of Cambridge for use on Unix systems connected to the Internet.

www.exim.org

 

[ffeingol]

I'll concur with @cPRex and you want to change those values with an abundance of caution. The default (per your post) is to try every 15 minutes for 2 hours. If you go shorter than 15 minutes you run a lot of risks of getting rate limited, blocked by grey listing etc.

You need to find out why Office365 is limiting you rather than trying to force it through.