Some hosts requires that you send email from a valid email address when using the sendmail program to send email with.
Ensure that you are sending email from a valid email address. This
means that the email address that you are sending email from needs to
an email address that belongs to the domain where ActivDesk is
installed on. To set this, go to the Control Panel >> Admin Functions >> 3 Custom Emails.
In this section
you can customize all email messages that is sent in various situations
by ActivDesk. Ensure that each email has a valid email address in the 'From Email address' field when editing the various email responses sent by ActivDesk.
It is recommended that you use the sendmail
program to send email with ActivDesk when ActivDesk is hosted on a
Linux based host.
If
you are using SMTP, ensure that you are using the correct mail server
address. The correct mail server address would look something like
this: mail.yourdomain.com - This address needs to be the address of the
mail server for the domain where ActivDesk is installed on.