XF 2.3 How to stop sending mails?

[Robert9]

A forum was incorrectly set up, and I have now corrected it. Possibly, a lot of emails have piled up, and the host has suspended the account. This has caused a huge problem— all of my client's emails across all his domains are now dead, and he has to wait until "later," which could take several hours. I checked the error messages and found 20,000 bounced emails.

1. How do I stop the email sending?
2. Will all outgoing emails now result in bounced emails?
3. Does this mean that all users have to do something before they can access the forum normally again?

Can such a situation, where the host suspends the email sending, cause a huge problem? Would we now have to change all user accounts that might have been altered today due to bouncing, using SQL?

Why do I find bounced emails multiple times for the exact same time in the list?

Do we have something like: Do not send more than 499 mails per hour?
Do not send more than 199 in one batch? (Yes, we have, i guess)

 

[Old Nick]

How do I stop the email sending?

in config.php

$config['enableMail'] = false;