fix mail blacklisting

How do I stop being blacklisted on Apple Mail?

Mac mini, macOS 11.6

Posted on Mar 2, 2022 2:32 PM

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Posted on Mar 2, 2022 3:06 PM

It is not the Mail app; it is your ISP server’s IP address. That happens if they allow too many spam emails to come from that IP address, so receiving servers block them. Contact your iSP to see about a different IP address.

20 replies

Mar 3, 2022 8:04 AM in response to don909

Good luck with that. I had the problem with an ISP some time ago. They did not care, evidenced by the fact that they were the ones allowing spam to be sent in the first place.


Don't know if this will work with Comcast router - it worked with mine: reset router by unplugging it from the wall for about 3 minutes. Then plug back in. This usually results in the router being connected to a different IP address. You can check that on the router's website.

Mar 3, 2022 9:58 AM in response to don909

Maybe some do, my ISP ignored it routinely. They just told me to reset the router to get a different IP address and they were aware that there were spammers at the other IP address. In other words: they did not care. FWIW, it was Centurylink.


@don909:


Sometimes it would revert to the old IP address; doing it a couple of times over 2 days or so usually worked.

Apr 18, 2022 1:02 PM in response to neurotoast

Well, I'm just another user and can't speak to the business practices of your ISP, but there could/may be more than one customer - some of the number sequences would change; example, I have an iMac, an iPad, and a phone, so my assinged IP address may be xxx.xx.xxx.01 and 02 and 03 identifying each device separately. They may blacklist the entire next to last 3 digits if someone else is sending excessive spam. That'll include you or anyone else with all the other numbers matching.


https://superuser.com/questions/1621681/how-many-internet-users-can-an-isp-assign-to-a-single-ip-address


https://suip.biz/?act=ipintpr


this one is not from my preferred company, but has the best explanation I've seen:


https://www.kaspersky.com/resource-center/definitions/what-is-an-ip-address

Mar 3, 2022 8:17 AM in response to babowa

Comcast Router is at our MA summer home and we are in FL on Spectrum.

I'm not sure which of the two IP addresses is being blacklisted. I would guess FL because the problem happened a few days ago in FL when Comcast said I had to change our password for security reasons. I unplugged the FL router as you suggested but the IP address stayed the same.


I'm supposed to get a call from Comcast's Security Escalation department later today to fix this.

Apr 18, 2022 11:54 AM in response to babowa

Thank you. One last question, is that IP address that is being blacklisted specific to me or to a bunch of other users? There's nothing nefarious going on here to my knowledge, so since this is happening two or three times a week for a day or two, might this IP address be covering more than just my one Mac?


PS I have terminated my Xfinity account as I have sold my house. I live in an RV and when I called Xfinity about the blacklisting, they said they couldn't help me because I didn't have a "service address".

Apr 24, 2022 10:21 AM in response to neurotoast

If you have any online accounts that store your email such as stores, banks, Google, Yahoo, and many others, you do not have to have the computer on for it to get stolen, hacked into, or bought from another crook. Some of them only want a legitimate email address to use to send out mass spam so you'll open it because you think it's from someone you know.

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fix mail blacklisting

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