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Full Version: users receive partially the mail notifications of new threads
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Hi, I have version 1.8.32 of MyBB and the Automatic Subscriptions plugin (1.2.2). When a user creates a thread, users enabled to receive email notifications should receive an email message informing them of the new thread.
But it doesn't happen like this, only some users receive the notifications, and I can't figure out where the problem is.

The users who receive the email notifications are not always the same, they change every time so I don't understand if it's an SMTP problem (which I tried to change to no avail) or a MyBB problem that doesn't correctly send the emails to the SMTP server.

I see no errors from the email system log and massmail seems to me configured correctly (view screenshots).

How can I do to understand and verify where the problem lies?