How to find the cause of duplication of mail messages in Bitrix?

Question

1C-Bitrix

How to find the cause of duplication of mail messages in Bitrix?
In C_FIELDS, the admin email starting with zakaz is repeated twice - at the beginning in bcc and again at the end, although in the template the field for the hidden email is not filled in any way.
Maybe it is installed somewhere else in Bitrix, how to find it? How to understand why the letter is duplicated?
In the table, it looks like this:

And the code is written in C_FIELDS

The template settings are as follows:

Answer 1

В настройках главного модуля есть пункт
если там указана почта, то на нее дублируются все отправляемые через почтовый модуль сообщения

Answer 2

I would look at the components that are responsible for generating mail messages, namely the place with CEvent:: Send, for a repeated call or for a double operation of a function or script. If both letters are the same (the same recipients of the letter with the same content), I would check this very moment.