Possible Thunderbird Issue

[Zema Bus]

Tonight after updating Arch I started getting certificate warnings every time Thunderbird would try to connect to the mail server or if I manually tried to get it to download email. At first I thought it was on the server side (my registrar and mail server are currently both with Hover), but there are no reports of anything there so far. And there are no reports I could find in the Arch forums, the Slackware forums, or in the Thunderbird forums, except one. One user reported the same certificate warning, and someone responding blamed it on McAfee antivirus, which that user denied having (her DNS shows mcafee.com), but her post was from right around the same time I started noticing it. I also have this issue in Slackware (though there the warning is just a small popup that just says the certificate isn't trusted, and then it refuses to connect and download email), which I did not update (but in Slackware Thunderbird is on a pre-release branch). In older versions of Thunderbird this issue doesn't occur (Debian).

[Grogan]

Maybe there were more posts later in that thread, but it was Mcafee shitware embedded in a Verizon supplied router in that case. Check out the post from Matt the Moderator (and it was applicable to the user)

That was all weird to me, so I did the usual and googled. I saw other with the same sorts of issues on chromebook and pixel forums among other places. The one that struck me was one of the resolved and that person was a Verizon customer with a Verizon FIO router that was causing the issue. https://support.google.com/pixelbook/th ... =149041810

So I think what is needed is to ask you if you are also perhaps using Verizon, even in a third party way as a hotspot.

Pertinent is this 2019 announcement by McAfee of their inclusion in the Verizon router.
https://www.mcafee.com/blogs/mcafee-new ... th-mcafee/

If that is not the issue, then we still have this announcement, also from McAfee indicating their software is embedded in routers from "D-Link, Arris, Verizon, CenturyLink, and others". So they do not offer a comprehensive list but hopefully that will be enough to track down the issue.

So I guess your are right and wrong. Your machine does not have McAfee installed, but some of your connection hardware probably does.

Please post back your findings on this. I am actually interested beyond the usual "support" thing.

[Zema Bus]

Yeah I noticed that after reloading that thread today, though not applicable in my case since there is no antivirus of any kind and I'm using my own pfSense router. Very weird, and bad timing since I was waiting on email from the personal loan lender. Fortunately this problem isn't occurring in Debian's version of Thunderbird. Don't think I'll be updating Debian for a while, I really need working email for multiple things right now related to moving.