Bitrix24 box. Case-letters randomly change to read status, what's the matter?

Question

Email

There is a post office.
There is Yandex mail.
Connected via IMAP,
When sending from Yandex mail, the status of the case in CRM immediately changes to read.

Answer 1

When sending from Yandex mail, the status of the case in CRM immediately changes to read.

Bitrix inserts a special pixel-image into the sent letter, upon loading of which the letter is marked as read. Some systems (for example, the mentioned Yandex) preload all images, respectively, it is immediately marked as read.