Configure AcyMailing to comply with SiteGround email TOS.
SiteGround’s web hosting solutions have a default email limitation of 400 emails sent per hour for StartUp and GrowBig plans and 800 per hour on GoGeek and Cloud plans, as per our terms of service.
If your Joomla! 3.x application is using the AcyMailing extension you will be able to configure it to send less than 400 messages per hour, by following the steps below:
Access your Joomla! 3.x Administrator area and go to:
Components > AcyMailing > Configuration > Queue process.
In the Manual send process configuration enter the following values:
Send 40 e-mails and then wait 6 Minutes before sending another batch.
More details about the AcyMailing configuration can be found in this article.