WE recommend disabling all mail scanning and filtering by anti virus products. Experience shows the plugins used for scam and spam filtering are unstable and a regularly cause of unexpected behaviors. That is a totally vendor agnostic situation. I have yet to see one that is actually stable and reliable for more than part of a single version of Thunderbird.

the {disarmed} subject modification has many sources. Nortons products do it. As does the Mailscanner server product which your mail provider may be using.

However I think you are having some sort of issue with the allowing of remote images. That does not allow any sort of remote access. It allows remote images (hosted on a server somewhere) to be displayed in an email without you being prompted. Nothing more.

For privacy and security reasons, Thunderbird does not execute any scripts in mails. So there is no information sent out from scripts embedded in emails. Although why you would want a marketer to know when where and how often you accessed their email is beyond me. But each to their own.

That's a lot to digest. I meant to say "Allow remote content" Matt said

So there is no information sent out from scripts embedded in emails.

That is actually good news. I read this on Google: "Disarmed in email subject {DISARMED} in email subject line. ... Whenever you see {disarmed} it means that a web bug or tracking code was found in an HTML e-mail. That is to say code that would have sent info back to a remote server without your knowledge or consent. {DISARMED} in email subject line | CIIC https://www.ciic.com/knowledge-base/common-email.../disarmed-in-email-subject-line/" I didn't read the article. From the TB article I'm guessing that the senders are using header info as they send remote content. I thought that they were getting some kind of reply when you allowed remote content. Glad to know they don't. Most times i don't allow it, but for a few sites, like eBay, pictures are worth a 1000 words. The emails that I have allowed seem to download just fine even though {DISARMED} is in the subject line. That begs the question what was disarmed? Anyway I'll endeavor to stop the scanning. I see that mailscanner is in use with my provider so there may be a problem. My main concern was that remote content that I wanted was disabled. The warning makes no difference to me. One more question if I can. I tried to import some old emails using a program suggested by TB. Some worked and some not. The folder was there. Properties said there was something in the folder, but the screen was blank. The programmers directions seemed to think I knew more about TB than he did. I gave up. Do you think that the scanner had anything to do with the import not working? Thanks David