Hello....I tried to email 500 people from Acymailing (via send mails manually) and the php mailing function. It started to send emails in batches of 40...with 120 seconds in between. At 25% the front-end and back-end of the website went into error 500 mode (red screen). I had to restore from a backup.
The 25% of sent emails did arrive...but not the rest.
Latest Joomlaa version and php 8.1
How do I avoid this in the future?