Thunderbird, Office365, GMail and Avast

Avast Free Antivirus / Premium Security
1

I’ve been using Thunderbird as my central email point for years. Different email addresses from different hosts, etc. – all fine.
About a year ago, GoDaddy “upgraded” my personal domain’s email to Office365. Managed to survive; all still working, though I couldn’t add a new email on my domain to Thunderbird.
This week, I’m told I have to update other details because MS is requiring Exchange (or something like that), and third-party email clients won’t work right any more.
Talked with GoDaddy support for over an hour trying to get it all working. Based on his research and our trial-and-error, all of the incoming and outgoing server settings seem to be working – but only if the Avast shields are disabled. This only seems to happen for the office365.com and googlemail.com domains. The others work fine with shields up.
Am I missing something?

Incoming Server Type: POP
Server Name: outlook.office365.com:995
Security: SSL/TLS
Authentication: Normal password

Outgoing SMTP Server: smtp.office365.com:587
Security: STARTTLS
Authentication: Normal password

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Incoming Server Type: IMAP
Server name: imap.googlemail.com:993
Security: SSL/TLS
Authentication: Normal password

Outgoing SMTP Server: smtp.googlemail.com:465
Security: SSL/TLS
Authentication: Normal password

2

Hi,

Can you see if this helps? https://forum.avast.com/index.php?topic=231152.0

3

That seems to have done the trick. Thank you!

4

Thank you for the confirmation.

5

Hi,
I’m having problems with downloading emails from various mail servers into Thunderbird (latest version, but also previous versions). When I deactivate the AVAST mail shield everything works fine, but when it is active no emails are downloaded. I tried the tip given above about reconfiguring IPv6 in Thunderbird, but this hasn’t changed anything. I also de-installed and re-installed Thunderbird from scratch, but still no change. Any ideas?
Thanks
DG

6

Did you follow the instructions offered by Avast?
https://forum.avast.com/index.php?topic=316060.msg1676341#msg1676341

7

Hi Bob, if you mean the link posted earlier in this thread by r@vast, then yes, I tried that - but without success.

8

I think I’ve fixed the problems by following the advice given here: https://support.avast.com/en-ww/article/91/

The only difference I found was that I couldn’t import the mailshield certificate as stated because I already had several AVAST mailshield certificates installed. I deleted these existing certificates and then imported the mailshield as per instructions.