Why does sending emails from Bitrix stop working after changing the email administrator?

Question

Email

Good afternoon!
I deployed a ready-made solution to Bitrix, indicated my mail during installation. When I finished everything, I changed mine to the customer's mail in the main module. And at once mail from sending forms ceased to come. As soon as I put the mail that I indicated during registration, the mail starts working. How to change - does not work.
With what it can be connected?

Answer 1

Example: sending from/to mail.ru list.ru .. mailboxes was limited on my hosting.
The letters didn't go away.
Specify your own domain [email protected] as the sender
. Test it. Each time, look at what is in the b_event table, the Success_exec field
Next to the hoster