How to set up sending emails from VPS?

Question

Mail server

Good day!
I'm trying to transfer the site to 1C-Bitrix on VPS (Beget). Configuration: Ubuntu and Vesta CP. No experience with servers. Faced a problem: letters with notifications do not come.
1. Looked at the b_event table - it shows that the letter has been sent
2. Tried to send a test letter through the mail () function; The function returns true that the message has been sent, but there is no letter in the mail.
3. Connected via SSH - executed sudo php -r "mail('[email protected]', 'Test, 'Test');" - letter came.
4. There are no errors in the mail logs (I registered the path to the logs in php.ini) Sendmail_path is registered in php.ini
. In which direction to dig, tell me?

PS I noticed a feature - the mail () function works 1 time after the server is rebooted - once the letter arrives, then they do not.

Answer 1

1. Make sure sendmail_path is configured and working.
Here are the approximate settings for $domain_name - your domain, respectively. For example website.com
[HOST=$domain_name]
sendmail_path = /usr/sbin/sendmail -t -i -f [email protected]$domain_name"
2. Make sure you configure php.ini for the PHP that is used on the site Create a
file with any name in the root of the site, for example myinfo.php and enter the code there:
<?php
phpinfo();
Save the file and open the file in the browser: your_domain/myinfo.php
In the window that opens, find the value of the sendmail_path parameter
. Check the logs of the mail server.When
sending a letter, there will definitely be sending logs:
For example, tail on the log and send a letter.
tail -f /var/log/exim/mail.log

Answer 2

Something like this: exim4. Setting up an SMTP server for our web server .