Vesta Control Panel - Forum

It is ok when I send mail with Roundcube in Vesta.
but it show error when I send mail with smtp from Vesta

SMTP ERROR: MAIL FROM command failed: 550 Access denied - Invalid HELO name (See RFC2821 4.1.3)

thanks for give me an answer.

http://mxtoolbox.com/SuperTool.aspx
test green, so the port 25 is ok.

Sounds like an authentication error.

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 4.1.3)

/etc/init.d/exim4 restart