FAQ / Server Products

I keep getting spam with the sender spoofed from my domain, how can I prevent this?
You need to setup SPAM Blocker/Detection/Sender/Options/SMTP vs MIME

Set the Internal Sender Domain match to BLOCK.

This prevents external users sending email with an SMTP Sender outside your domain but a displayed FROM field in the email header at your domain.

Also you should setup an SPF record for your domain. To do this use the wizard available here:
http://www.openspf.org/
And add a DNS txt record to tell servers who is allowed to send email from your domain.

Then setup SPF checks in Hexamail under SPAM Blocker/Sender/SPF

There are also the following guides: