Hello, from https://support.mozilla.org/en-US/questions/1156168

Please do each of these, in order.

1. Double-check the e-mail server settings in Thunderbird with what your e-mail provider says they should be:

Rogers e-mail settings http://www.rogers.com/web/support/internet/email/87?setLanguage=en

In Thunderbird, Thunderbird menu: Tools: Account Settings (If you cannot see the Thunderbird menu, press the Alt key or F10 key on your keyboard to show the menu)

For incoming e-mail: Select "Server Settings" on the left side under your e-mail account, and the settings are on the right side.

For outgoing e-mail: Select "Outgoing Server (SMTP)" on the left side, then select the server you want on the right side. Click the "Edit" button to change the settings.

2. Restart Thunderbird with add-ons disabled (Thunderbird Safe Mode). On the Help menu, click on "Restart with Add-ons Disabled".

If Thunderbird works like normal, there is an Add-on or Theme interfering with normal operations. You will need to re-enable add-ons one at a time until you locate the offender.

Pleas tell us if it helps.

As far as I know, TB doesn't support OAuth2 authentication for Rogers accounts, but I think you can still set up POP, IMAP and SMTP service in TB if you create an App password in the Rogers Member Centre. The settings, which you may have to enter using the Manual Config., would be:

incoming IMAP server: imap.broadband.rogers.com port: 993 Connection security: SSL/TLS Authentication: normal password (app password) User name: full email address

incoming POP server: pop.broadband.rogers.com port: 995 Connection security: SSL/TLS Authentication: normal password (app password) User name: full email address

outgoing SMTP server: smtp.broadband.rogers.com port: 465 Connection security: SSL/TLS Authentication: normal password (app password) User name: full email address

https://www.rogers.com/customer/support/article/email-setup

First, thanks to both of you for offering your help.

'smorele', a Rogers rep worked with me to review the settings so we were both aware of settings and their locations. Unfortunately, only the SMTP settings offer OAuth2 as a fifth option in the "authentication method" pull-down menu ... the POP server only offers four options, missing OAuth2.

'sfhowes', as mentioned above, TB offers OAuth2 for SMTP but not POP. The rep was also confused about this omission. I already have a username and password as I've had this account for YEARS. I can log in from my desktop automatically by opening TB or log in from any other computer by logging into Rogers Yahoo and entering my, same, username and password. Only now is there an effort towards higher security.

I can create a new app password and recreate my e-mail account but I don't want to use the randomly generated password. No idea why I can't continue using the same setup I've had for years.

Even though the TB menu shows OAuth2 as an available option, it has not yet been implemented for any other service besides Gmail. Until Yahoo, Rogers etc. are supported, I suggest you follow the instructions to create an app password. You only need to enter it once, during account setup, and you can still use the normal password to access the account through the Rogers webmail interface.

Back again ..... (without doing any changes) .......

So, I have been able to retrieve e-mails through Thunderbird, for the most part, but in the last month (on two occasions) I had to close and re-open Thunderbird 14 times. Why would 13 tries fail but the 14th work?

A message stating "connected to pop.broadband.rogers.com" (where it sits for up to 20 seconds) , then "failed to connect to server pop.broadband.rogers.com" appears. When successful, it states immediately "host contacted" and retrieves e-mail.

Any ideas?

If the connection is ultimately successful after many tries or a long delay, it suggests that all TB settings are correct, but that some security/AV program is interfering with mail connections. Start Windows in safe mode with networking and then run TB to see if there's any change in performance.

Thanks, 'sfhowes'. I didn't think of that as a possibility.

What I normally do is try opening TB as soon as Windows starts and this could be affected by the AV program. I will now wait and see if things change.