Error when sending mail to 1s accounting?

Question

1C

When sending mail and when checking, an error message appears.

Settings checked everything is ok. With the given password and login in the browser, we connect and everything is ok. And in 1s they say it worked before. No one remembers exactly when it stopped working, tentatively in November. In the mail settings there are permissions for external connection.

Answer 1

Download SmartSniff (you can do something else, it's just free and portable) https://www.nirsoft.net/utils/smsniff-x64.zip
and try to view the entire session in the debugger - you will find out what password 1Ska sends. Although it seems that even without a sniffer it is clear that the credits are incorrect.
PS
Logs on the mail server can even say more.

Answer 2

Good afternoon!
Around the same period, Yandex included application passwords.
That is, there is a regular password (they called it Portal) and there are separate passwords for third-party applications.
Try the following:
1. Check if you have enabled the portal password for third-party applications - Mail → All settings → Mail programs
2. Enable application passwords in Yandex Passport and try sending using a separate application password
3. Recently, Yandex has been blocking such mailings as option try to configure sending via third-party SMTP, you can read more here https://7fk.ru/nastroyka-smtp/

Answer 3

Yandex has changed its security policy when working with third-party applications. Now, to set up mail in 1C programs, you must specify a special application password, and not the main account password. The idea is not to expose third-party applications to the main password, which gives full access to all Yandex services and services.
To set up Yandex mail in 1C programs, in the security section of your Yandex personal account, you need to generate a special password for a third-party mail application and specify it in the 1C settings.

Read more Setting up Yandex email in 1C programs