Vesta Control Panel - Forum

Try to this commands for fix
apt-get update
apt-get upgrade
rm -f /var/run/vesta-php.sock
service vesta restart


This worked for me, only with yum command on CentOS7
yum update

Thanks a lot...

well now, after restarting Vesta service I have 502 Bad Gateway msg again. This I can see on ...

I just found the answer here: https://forum.vestacp.com/viewtopic.php?t=7410


Access denied - Invalid HELO name (See RFC2821 4.1.3)

Edit
vi /etc/exim4/exim4.conf.template

Comments lines
# drop condition = ${if isip{$sender_helo_name}}
# message = Access denied - Invalid HELO name (See RFC2821 ...

The error is invalid HELO name. When your server connects to another to deliver e-mail, it states it's name in a greeting. That name is expected to be a fully qualified domain name which then has a matching DNS record to the connecting IP.

Open up Exim configuration file. This could be /etc/exim ...

I experienced the same error message. After little investigation I have found that the user was logging in to the web mail client (Roundcube) trough the IP address of the mail server instead of logging in trough the DNS name. In such case, roundcube is sending the IP address as part of sender name ...