Interspire stops sending, must be restarted after sending 200-500 emails

[edigest]

Looking for any feedback from Interspire users:

CPanel with Exim, mostly default configuration. Tested on two servers, both with current CPanel, CloudLinux and LiteSpeed. One 'light' dedicated server (quad core, 8GB RAM); the other a very beefy dedicated server (Octa core, 32GB RAM).

Interspire starts sending but stops at +/- 200 emails. This happens both using PHP mail and using SMTP with Amazon SES.

I removed all limits in Tweak Settings. No help.

Any Interspire users have any experience that might help?

 

[cPanelMichael]

Hello

Do you notice any particular errors in /var/log/exim_mainlog when the deliveries begin to fail?

Thank you.