Is it reasonable to check PTR DNS records?

Posted by goran on Server Fault See other posts from Server Fault or by goran
Published on 2010-05-04T11:37:39Z Indexed on 2010/05/04 11:38 UTC
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As all mail things change I wanted to get some thought if checking PTR DNS records these days is advisable?

1) I do want to use it if it will actually bring benefit

and

2) I do need to keep false positives as close to zero as possible.

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