Cisco Spam Blocker

Answered Question
Dec 3rd, 2009

Should I modify the A record and reverse DNS to point to the Public IP on the Cisco Spam Blocker

I have this problem too.
0 votes
Correct Answer by dzavasni about 7 years 1 month ago

That is correct. You want the blocker to be first in line for your email handling so that it can filter and inspect properly and then deposit the filtered mail to your mail server. And as you say, you'll want the PTR record to match.

  • 1
  • 2
  • 3
  • 4
  • 5
Overall Rating: 5 (1 ratings)
Loading.
Correct Answer
dzavasni Thu, 12/03/2009 - 10:38

That is correct. You want the blocker to be first in line for your email handling so that it can filter and inspect properly and then deposit the filtered mail to your mail server. And as you say, you'll want the PTR record to match.

jsteer Thu, 12/10/2009 - 05:16

It's important that you have A & PTR records set correctly. Failure to have correct reverse dns is a major problem for many senders of mail.

There are some good guidelines on the internet around other best practices that are worth reading, including:

- MAAWG - sender best practice

http://www.maawg.org/about/MAAWG_Sender_BCP/MAAWG_Senders_BCP_Combine.pdf

Not all may be relevant however it's an excellent source of things to consider for sending mail to the internet

- Gmail POstmaster

http://mail.google.com/support/bin/answer.py?hl=en&answer=81126

Jason

Actions

This Discussion