1917355 - Very slow to delete messages, and slow to load messages with Microsoft Defender

Status: RESOLVED INVALID

(Thunderbird :: Untriaged, defect)

Description

[[e-mail]]

User Agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64; rv:129.0) Gecko/20100101 Firefox/129.0

Steps to reproduce:

I added Thunderbird as a folder to my list of "exclusions" in MS Defender virus and threat protection. I took it off the list. I put it back on. I took it off. Restarted TB multiple times.

Actual results:

At first, TB returned to normal and I was able to load and delete my email messages like I'd always done in the past. Less than a second between each message. But after a few days, the problem returned. I click on a message to delete it and it hangs there for 5-10 seconds before deleting. This turns the daily task of deleting emails into a much longer and pointless task.

Expected results:

I would like my messages to load and delete as quickly as they used to in older iterations of TB.

Comment 1

[Wayne Mery (:wsmwk)]

What is your full version number?

Comment 2

[[e-mail]]

128.2.0esr

I changed the way I added TB as an exception to my virus protection, including the user pathway, and that seems to have helped. Though I wonder how long that will last, and how safe it is excluding TB from virus protection.

Comment 3

[Wayne Mery (:wsmwk)]

Thanks for the update.

How many messages in the Trash folder?
And how many messages in the folder from which you are deleting?

Comment 4

[Magnus Melin [:mkmelin]]

I don't think there's much we can do here. One option, apart from excluding the profile from constant virus scanning, is using maildir.