1662799 - Can't download emails after upgrade from 68.12 to 78.2.1

Status: RESOLVED INVALID

(Thunderbird :: Security, defect)

Description

[Phil Agar]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36

Steps to reproduce:

I upgraded from 68.12 to 78 and now I can't download emails

Actual results:

I can send messages, but no new emails are received. All settings are the same and correct. I tried a new install and new profile, no luck.
I had to uninstall all, use filesync to restore and changed files from Fridays profile backup to todays profile.

I installed 68.0, it was unhappy as the profile was created in version 68.12, so I created a test profile, went to about and allowed an update, restarted added the -p to the icon. When I selected my profile all now works with the same settings that wouldn't work in 78

Expected results:

it should have worked

Comment 1

[Wayne Mery (:wsmwk)]

Check your antivirus SW/Firewall

Comment 2

[Anje]

Have you asked a question in the Thunderbird Support forum regarding this issue?
If no, the first place to ask for help is the Thunderbird Support forum which can be accessed via Help > Thunderbird Help or https://thunderbird.net.

This forum is for reporting bugs, which at this point has not been determined. Bugzilla is not a Help Forum.

Did you read the release notes for 78 which mentioned TLS 1.0 and 1.1 were disabled?

Try the following to see if the issue is due to Thunderbird 78* disabling TLS 1.0 and 1.1
When using version 78*
In Menu app icon > Options (Preferences on Mac) > General
Scroll forever to the bottom and click on 'Config Editor'
accept the risk
In search type: tls.version
look for this line : security.tls.version.min
Double click on line to open an edit window and enter the number 1
click on OK.
EDIT - some users report also needing to set security.tls.version.enable-deprecated to TRUE. To create this setting right click in the settings area > New > Boolean.
Exit window - top right x

This will set that preference back to the same level as used automatically in version 68*.

EDIT - THESE CHANGES MAKE YOUR EMAIL VULNERABLE. THIS SHOULD BE CONSIDERED TEMPORARY until your mail provider enables TLS 1.2 and higher

Comment 3

[Phil Agar]

Dear Anje
Sorry for the delayed reply, I was too afraid to upgrade to 78 once I had downgraded. Somehow my son upgraded his to 78 so I tried the above and it worked. I really appreciate your reply
Thank you, thank you

Comment 4

[jobi73]

Thanks Anje!

With
"look for this line : security.tls.version.min
Double click on line to open an edit window and enter the number 1"
it worked again immediately 👍🏻

Comment 5

[Phil Agar]

Yes

Comment 6

[Phil Agar]

Sorry, my brief yes could be again misinterpreted, so yes to the following

In search type: tls.version
look for this line : security.tls.version.min
Double click on line to open an edit window and enter the number 1

I did not need to
security.tls.version.enable-deprecated to TRUE