Filtering SMTP

In this section we’re providing some implementation guidelines for developers and integrators of MTA products/appliances willing to use Spamhaus products to block as much spam as possible.

No reference is made to specific products. Rather, the focus is on the actions to be taken.

Wherever a reference is made to specific configurations, it will be assumed that DQS is used as lookup mechanism.

Guideline on filtering SMTP sessions

• SMTP session phases
  • Envelope Checks
  • Headers checks
  • Body checks