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Can you block a whole domain like “comcast.net”?

I get spam emails mainly from “comcast.net”. Can I block all emails from that domain or do I have to block each email one at a time?

Posted on Apr 4, 2022 7:50 AM

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Posted on Apr 4, 2022 8:44 AM

You don't need to use another Mail client like Outlook, you can create a Rule in Apple's Mail client to block a whole domain however remember it will block EVERYTHINGS with that domains name in it. To coin a term, please be careful what you wish for.

9 replies

Apr 8, 2022 5:59 AM in response to Art.A

You should enable and train the spam/junk mail filter:

Reduce junk mail in Mail on Mac - Apple Support


You can also do the same thing with your email provider.


I find filtering usually gets rid of the majority of spam, with most of the other unwanted emails for me are ones that I accidentally signed up for or someone else signed up for me for work.


It is dangerous to filter a whole domain, because there are a lot of legitimate users sending mail from a Comcast domain.

Apr 4, 2022 8:00 AM in response to Art.A

Do the junk emails have 'unsubscribe' at the bottom of the message, if so click on it and unsubscribe. This is only a sensible option if you are sure that you are on a legitimate subscription list.


You can access Rules in the Mail system preferences and you should be able to create a rule to capture any mail from comcast.net and file it in Junk or Bin.

Can you block a whole domain like “comcast.net”?

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