Best Practices for SMTP Blocking?
Question asked by Lucidio Arruda Neto - October 11, 2016 at 11:05 AM
We often take advantage of SMTP Blocking to block known EHLO domains from spammers and scammers with use of astericus as a joker.
Example: ... and so on.
So we put a block record for  "*".
If we only add "" will be suffice in this case?
In some cases we get
results in a "*.domainhs*.com" record added.
We have a good success rates with this approach, but in some cases the SMTP Block is skipped.
Also with blocking list getting bigger and bigger I worry some impact on performance. Whats your thoughts?

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Rod Lasky Replied
Employee Post Marked As Answer
Hi Lucidio.  If you'd like to block SMTP connections from any address at a domain, you could use * at Security >> Advanced Settings >> SMTP Blocking.
Rod Lasky
Technical Support Specialist
SmarterTools Inc.
(877) 357-6278

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