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Thunderbird stopped working with office365 after update

I am running Thunderbird 78.1.1 on a Mac (OS 10.13.6 = High Sierra). I've been using Thunderbird as my email client for over a decade. On Monday Thunderbird asked me to… (read more)

I am running Thunderbird 78.1.1 on a Mac (OS 10.13.6 = High Sierra). I've been using Thunderbird as my email client for over a decade. On Monday Thunderbird asked me to update (to 78.0.1) and after I did that it stopped sending or receiving email via my work account, which is via smtp.office365.com. Thunderbird has frequently been slow via both my accounts, but now it is timing out ~80% of the time to my gmail account and 100% of the time on my work account. I did not change any server or email settings. My ISP is AT&T Uverse, my firewall is the built-in Mac firewall and I turned that off without effect. I am not running anti-virus software, to the best of my knowledge. The error messages I'm getting when trying to send email are

"Sending of the message failed. Peer’s Certificate issuer is not recognized. The configuration related to smtp.office365.com must be corrected."

and the same thing using the gmail server: "Sending of the message failed. Peer’s Certificate issuer is not recognized. The configuration related to smtp.gmail.com must be corrected."

Two screenshots of my smtp settings are attached.

Thanks for any guidance!

Asked by ted.von.hippel 2 months ago

Last reply by ted.von.hippel 2 months ago

tag email in inbox move to next when tag 2nd email 1st email tag gone. Using Safe Mode Mac

Safe Mode TB 68.11.0 64-bit Mac 10.14.6 Process: tag email in inbox see correct tag in column move to next email in inbox tag 2nd email 1st email tag gone No only that… (read more)

Safe Mode TB 68.11.0 64-bit Mac 10.14.6

Process: tag email in inbox see correct tag in column move to next email in inbox tag 2nd email 1st email tag gone

No only that, but I went to take snagit photos of the screen and now both messages are gone. Checked my account via the web and they are gone.

Stopping the use of tags. This is not the first time, emails are gone. They just seem to disappear.

Love Thunderbird, but I am in business and I can't afford to lose emails.

Asked by spikul 2 months ago

I lost 6 years of bookmarks!!

I have owned my Mac Book Pro since 2014 and I inadvertently re-installed Firefox without knowing a new profile would be created. I am not able to load my old profile into… (read more)

I have owned my Mac Book Pro since 2014 and I inadvertently re-installed Firefox without knowing a new profile would be created. I am not able to load my old profile into the new one. I can see the "old Firefox data" folder and have tried everything Firefox has to fix this but nothing is working. I have lost 6 years of bookmarks!

Anything other tricks to fix this? Thanks!

Asked by mommos2013 1 month ago

Last reply by OBW47 1 month ago