VestaCP – Can not Send email – SMTP Error (550) – Invalid HELO name


SMTP Error (550): Failed to set sender “[email protected]” (Access denied – Invalid HELO name (See RFC2821 4.1.3)).

You should add smtp helo name in the mail configuration. Find the file and edit it

nano /etc/roundcube/

add the line.

$config['smtp_helo_host'] = 'localhost';

Now login to your mail client and test the outgoing mail by sending one.

About The Author

Leave a Comment

Your email address will not be published.

Scroll to Top