so from what I understand you are implicitly deleting the mail from one account and then adding it to another, both being IMAP accounts you can not actually move from one to another.

Is the filter set to execute after junk processing. this occurs after a complete local download of the message body, Usually filters work when the meta data excluding the message body is received adding the delay for spam processing allows for time to get all the data you are going to be moving instead of some of it.

Hi Matt, read your reply, thanks. 1) I don't see the process as a deletion The bbmde mail is sent to my gmail acct. It stays there. I merely send the bbmde mail to the local folder (still) in its original hotmail folder on my w11 laptop. When the filter works, that's what I want it to do. It works, sometimes, hence post here. 2) Following your suggestion, I did just chg the filter to act "after" junk mail weedout. We'll see how that works. Thank you.

Hi Matt, read your reply, thanks. 1) I don't see the process as a deletion

Email is in WallysWorld@Somewhere.com you "move" it to Franko@wallyworld.com If the account is IMAP that means the mail is deleted from WallysWorld@Somewhere.com. IMAP has no way to move an email from one account to another.

Certainly if the account is POP there is only local copies of mail involved and they can be moved. But as you have not said what mail protocol you use I have assumed the default (IMAP)

What you have just said is you copy the mail and make a new copy retaining the old. This iat odds with your initial post were you said.

sometimes I have to physically delete the msg.

That does not sound like making a new copy and retaining the old in the account it came into.

SO we can be sure I am not lost and we are on the same page. Please check the account settings for the account the messages are coming for and the account they are going to and confirm if they are IMAP or POP

Unless you have issues with your antivirus program, quite likely they are poor products when put under a microscope for efficiency and stability. You almost certainly have an IMAP account in there as they are the ones most likely to demonstrate unstable filtering unless it is done after junk processing. Please prove me wrong and determine if you need an exception in your antivirus product for the Thunderbird profile folder to allow Thunderbird to actually work without the incessant and lengthy delays scanning causes. Updates from filters can't be saved because the scanning is taking longer per folder than the time between accesses.