Auto-populated settings from Mozilla for verizon.net email would not work.

What does this mean? Has the account been created in the first place and now still has the wrong settings?

A new Windows 10 PC was purchased, Thunderbird was installed on it, the existing Verizon wireline email address was entered during the setup procedure, and pop.verizon.net and smtp.verizon.net were automatically downloaded and populated in the appropriate fields by Mozilla. But these addresses would not work. I found a Verizon/Yahoo forum posting stating that the correct addresses were incoming.yahoo.verizon.net and outgoing.yahoo.verizon.net. I substituted these addresses manually, and email began working well in both directions. Hoping to assist future Thunderbird users with Verizon wireline email accounts, I wondered whether the server addresses being downloaded into Thunderbird could be modified by the folks who maintain the Mozilla database to conform to this apparent new set of server addresses?

The settings were downloaded from here.https://autoconfig.thunderbird.net/v1.1/verizon.net

They match those advertised by Verizon.https://www.verizon.com/support/consumer/email/settings

But I am aware they migrated most of their user base to AOL following that acquisition. https://help.aol.com/articles/verizon-move-to-aol-mail-faq

With regard to Yahoo I have no idea. But basically unless they publish settings, we can not update the database. As it stands their published settings are those being used.

Thanks for your response, Matt. It appears that the problem is that different verizon.net email addresses use different server addresses. Having retired from Verizon, I know that their network is a combination of networks, including AOL and Yahoo, along with their original email accounts. I thought that perhaps they had settled on one incoming and outgoing server address, but apparently that did not happen. For those who read this, I learned the hard way that the addresses here--> https://help.yahoo.com/kb/verizon/SLN4724.html are the ones that worked for me this month for verizon.net email setup with DSL or FIOS in the Buffalo, NY area. Maybe this will save others the hours it took me to identify and fix the problem here. Thunderbird is excellent, and it was worth the effort. Again, thanks for explaining what is happening.

If you ever get to the bottom in a meaningful way, please file a bug to update the database.

This old bug would make a good template for product etc. https://bugzilla.mozilla.org/show_bug.cgi?id=839494