reivil0

We experienced exactly the same behavior and think it’s a specific conflict between Postman and Sucuri. We tried the Alpha code but since it’s focused on filtering and not limiting the spammy notifications don’t think that’s the best solution. We stopped using Postman and migrated all our sites to using WP-SMTP-Mail instead. We have not seen any problems anymore since migration.

In Sucuri you can stop Post-Type Alerts for Postman Sent Mail.
That’s what we did (temporary?) on sites with sudden explosive increase of alerts.
We had 6K+ more notifications per day recently!
We don’t see any pattern in the sites having this increase and those that don’t have.

I also used Postman SMTP on all the concerned sites but always with the same sending email address. Due to sudden increase of Sucuri notifications on a few sites the combined amount of messages on one day (+6000!) triggered hosting email suspension. I’m now migrating to sending with different addresses on each site and using WP-SES instead of hosting email. Loved using Postman SMTP though.

this update only to tick ‘Notify me of follow-up replies via email’

We are experiencing the same email spamming post updates from Sucuri since yesterday!
The sudden large increase in Sucuri notification emails even caused our hosting to currently suspend our mail.
We also suspected it to be a bug or something due to recent Sucuri plugin change.
Please advise.