2020-09-11 13:03:18 Connection: opening to smtp.mail.ru:465, timeout=300, options=array()
2020-09-11 13:03:18 Connection: opened
Warning: stream_select(): You MUST recompile PHP with a larger value of FD_SETSIZE.
It is set to 1024, but you have descriptors numbered at least as high as 1078.
--enable-fd-setsize=2048 is recommended, but you may want to set it
to equal the maximum number of open files supported by your system,
in order to avoid seeing this error again at a later date. in ********/www/lib/phpmailer/src/SMTP.php on line 1169
2020-09-11 13:08:18 SERVER -> CLIENT:
2020-09-11 13:08:18 CLIENT -> SERVER: EHLO *******.ru
2020-09-11 13:08:18 SERVER -> CLIENT:
2020-09-11 13:08:18 SMTP ERROR: EHLO command failed:
2020-09-11 13:08:18 SMTP NOTICE: EOF caught while checking if connected
2020-09-11 13:08:18 Connection: closed
2020-09-11 13:08:18 SMTP Error: Could not connect to SMTP host.
2020-09-11 13:08:18 SMTP connect() failed.
https://github.com/PHPMailer/PHPMailer/wiki/Troubleshooting