Invoice emails not sent

Hi Hillen,

Last month my invoices have not been sent. Big thing, of course.

I can’t really find what is wrong except one thing:
When I send a test email I get this message:

Expected response code 250 but got code “550”, with message "550 Bad HELO - Host impersonating domain name [myhostname.com] "

Sincerely hope you can help me out! Thanks, Robert


Self hosting, V4.5.17

Errors (some hopefully not so relevant parts replaced with ‘…’ for privacy reasons)

[2020-02-12 19:09:30] production.ERROR: ErrorException [0] : /home/…/public_html/finserv/vendor/symfony/process/PhpExecutableFinder.php [Line 65] => is_executable(): open_basedir restriction in effect. File(/opt/alt/php73/usr/bin/php) is not within the allowed path(s): (/home/…/:/home/…/domains/include/:/etc/pki/tls/certs:/tmp:/var/tmp:/usr/local/lib/php/:/usr/local/php55/lib/php/:/usr/local/php0/lib/php/) {“context”:“PHP”,“user_id”:0,“account_id”:0,“user_name”:"",“method”:“GET”,“user_agent”:“Softaculous”,“locale”:“en”,“ip”:"…",“count”:1,“is_console”:“no”,“is_api”:“no”,“db_server”:“mysql”,“url”:“update”} []
[2020-03-20 13:22:13] production.ERROR: Expected response code 250 but got code “550”, with message “550 Bad HELO - Host impersonating domain name […] " {“context”:“PHP”,“user_id”:1,“account_id”:“1”,“user_name”:”…",“method”:“POST”,“user_agent”:“Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:74.0) Gecko/20100101 Firefox/74.0”,“locale”:“nl”,“ip”:"…",“count”:1,“is_console”:“no”,“is_api”:“no”,“db_server”:“mysql”,“url”:“setup”} []

Maybe the info here will help?

https://github.com/PHPMailer/PHPMailer/issues/1095