Thunderbird has Global Junk setting in options. On the toolbar > Options > Security > Junk. Beyond this junk processing occurs often in three places, not just Thunderbird

• The mail server operated by you mail provider. This is sometime something you can not opt out of. For example the Yahoo junk filtering is not optional.

• Within Internet Security Suites/Anti virus program there is often an anti spam tool that filters mail to spam

• Junk mail filtering within Thunderbird using Bayesian learning.

These three methods are in addition to external programs such as those shown here

These three things do not work together. Usually when we see people in this forum with questions such as yours it is one of the other two forms of spam filtering that is the cause. of their belief that Thunderbird is some how doing something wrong.

Never mind. I found "Enable adaptive junk mail controls for this account" in the Account Settings. Probably I didn't know what this meant when I first set up Thunderbird and it's been disabled for years. I enabled the function, marked a message that was identified as junk as "not junk" and the junk classification seems to have stuck. Probably with adaptive junk enabled, it would have not classified it as junk since the sender is in my address book.

Answer: RTFM But first you need to find the FM.

The answer is reassuring. Unfortunately... for Thunderbird 38.5.1, French version OS Windows 10 when a header appears "Thunderbird thinks this message is fraudulent", one attributes the problem to Thunderbird and not to any other source. When one clicks on "acceptable", closes the message, and closes Thunderbird, one would not expect to reopen Thunderbird, reopen the message and find "Thunderbird thinks this message is fraudulent". Since one does, one goes to Options > Security > Junk and unchecks "mark messages as fraudulent". Then "OK", then close everything. When one opens again, the box is still unchecked, but when one opens the mail, one finds "Thunderbird thinks this message is fraudulent". In fact, whatever one does, whether one activates controls in account settings and adds the address to one's address book or whether one disactivates controls, one will always get "Thunderbird thinks this message is fraudulent". I removed Thunderbird entirely, and I mean entirely, Program Files and Application Data, and I reinstalled it, and the result is still the same. Could one get recognition that there is a bug in Thunderbird and simply hope that someone will fix it in a later version? Thanks so much.

rymdcld said

The answer is reassuring. Unfortunately... for Thunderbird 38.5.1, French version OS Windows 10 when a header appears "Thunderbird thinks this message is fraudulent", one attributes the problem to Thunderbird and not to any other source. When one clicks on "acceptable", closes the message, and closes Thunderbird, one would not expect to reopen Thunderbird, reopen the message and find "Thunderbird thinks this message is fraudulent". Since one does, one goes to Options > Security > Junk and unchecks "mark messages as fraudulent". Then "OK", then close everything. When one opens again, the box is still unchecked, but when one opens the mail, one finds "Thunderbird thinks this message is fraudulent". In fact, whatever one does, whether one activates controls in account settings and adds the address to one's address book or whether one disactivates controls, one will always get "Thunderbird thinks this message is fraudulent". I removed Thunderbird entirely, and I mean entirely, Program Files and Application Data, and I reinstalled it, and the result is still the same. Could one get recognition that there is a bug in Thunderbird and simply hope that someone will fix it in a later version? Thanks so much.

On the toolbar > Options > Security > email scams and turn the option off.

I have no idea why your posting on a thread about junk mil however. Junk processing and scam detection are two different things.

I understand your question and apologize sincerely. Indeed, I failed to give you vital information about the configuration. I have several accounts with different clients. One of these is with Yahoo. You may know that Yahoo has a junk filter which, I what I read is correct, cannot be turned off. Now whatever enters the Bulk mail box is immediately and also (my problem) irreversibly marked "undesirable". I can transfer these messages to the inbox but I cannot get them to be acceptable. Thunderbird's own filters are ineffective because they cannot apply before indesirable status is attributed. Yahoo's filters seem to have no effect on this decision. And of course, the same is true of Options > Security > email scams, what I referred to in my message as "> junk" translating "indésirables". Fine then. Thunderbird is just taken over by Yahoo and cannot be blamed for that. It is true that no other client has ever posed any kind of problem. Sorry to have been a bother.

Do you have the adaptive junk filtering turned on in the Thunderbird account settings for your Yahoo mail? Although this won't fix the Yahoo junk mail filter, or the first move to Thunderbird's junk folder, if you open the message in the T-Bird junk folder and click the "Not Junk" button it will move the message from the Bulk Mail folder to your Yahoo Inbox folder.

Furthermore, with the adaptive junk filter turned on, if the sender is in either your personal address book or collected addresses (if you have that turned on), future messages from that sender won't be classified as junk by T-Bird.

It's not a perfect system, but you can make it a little more cooperative than with the default settings.

My observations on this appear to be that the Yahoo junk filter continuously check the entire contents of the inbox. About the only way I have seen that stops it over riding what the user defines is to use POP instead of IMAP. But that defeats the use of folders other than the inbox.

I have seen filters suggested online for placing in the yahoo account that effectively are supposed to tell Yahoo not to mark any mail junk. But I have seen no one that has actually made them work on a consistent basis.

My suggestion is create an account with a mail provider that is not sure they know better than you and redirect all mail to ther Yahoo account to the new provider.

"Do you have the adaptive junk filtering turned on ... click the "Not Junk" button it will move the message from the Bulk Mail folder to your Yahoo Inbox folder."

This happens for me whether the junk filtering is turned on or not. I discovered it by chance and was doing it, in fact, as the quickest way to move the messages. Today for the first time a Yahoo filter worked for me: just a separate "if sender contains <name> move to inbox". The message came there unflagged. I should obviously be able do this for any sender I want to divert.

"create an account with a mail provider that is not sure they know better than you" Yes, of course, just get rid of them. I've just been putting if off because it's a pain to make the changes. Once again, thanks for taking the time to reply to this relatively minor headache.

Lets reduce the pain.

Pick a provider. GMX is good, but has some delivery issues because they value provacy above anything else. Google is still Ok, but they are very busy building a walled garden around things, so interoperability is getting harder. Hotmail/Outlook is getting worse and worse for POP account. But appear Ok for IMAP. Again a walled garden, only worse. Apple mobile me or whatever it is called is a good option for Apple users that do not use calendars. Then it becomes a problem.

All of those providers (as well a yahoo) offer the ability to enter your old email address and password and they will collect your mil. Usually in a 15 or 30 minute interval. Change over complete.

You could then add a rule in Thunderbird to reply to any mail originating in the yahoo account with a template that advises the sender of your new address. Change over will still require changes for mailing list etc in the long term, but in the short term you just continue as before really.

Actually for good fun, Incredimail is alright. They've had an issue with Windows 10 but think they've fixed it now.

Actually some of the greatest flame wars I have seen on mailing lists are clowns sending megabytes of graphics to say I agree. What mail program encourages this? That would be incredimail.

Want a fight (err fun) . Send that sort of rubbish to someone who is paying by the MB for data on their phone. Better yet send it to someone who is still on dial-up. They just love waiting 20 minutes to get an email that says "me too".

I still get upset with those that send me their 500kb signature to every reply on an email thread. A 5mb email and 95% of it is their email signature repeated 10 or 20 times. telling me they have a Facebook page. They usually get upset when I snip their email to just the pertinent information, but I am old school. I like my email text heavy and graphics light.