How to solve the problem with mail in Bitrix24 on CentOS7?

Question

Mail server

Good afternoon,
I have a problem with mail on a CentOS 7 server with Bitrix24.

Postfix is ​​installed on the server. When sending mail from the server (for example, forgot the password), the recipient sees. that the letter is without encryption and signature (a red padlock crossed out in Yandex mail). Installed DKIM, but somehow did not help.

Please help me to solve this problem.

Answer 1

Configuring SPF and OpenDKIM https://wiki.debian.org/opendkim
Configuring SPF and DKIM will reduce the chance of an email being classified as spam.
and to confirm your domain as a mail server, add data to https://postmaster.google.com/
For example, DKIM generator https://2ip.ru/dkim/
Debian + Postfix + Dovecot + Multidomain + SSL + IPv6 + OpenVPN + Multi -interfaces + SpamAssassin-learn + Bind
https://habr.com/ru/post/413689/
You can also connect a third-party mail server to your server and use it in B24 via msmtp:
https://www.rennetti.com/cheatsheet /235/using-msmt...
For example, make an application through Google and connect via msmtphttps://dev.1c-bitrix.ru/learning/course/index.php...
There are also databases with IP addresses, and if your IP is in at least one database, it will always end up in spam, regardless of other parameters, you will need to remove your own IP from these spam databases or change your IP address to a "clean" one.
For example, by ip from this site in the Black Listed section

https://anti-hacker-alliance.com/index.php?ip=178... .