Sometimes, mail marked as Spam by Yahoo and moved to the Yahoo Spam folder still gets collected by Thunderbird
Some mail that is automatically moved to the Yahoo Spam folder is getting picked up by Thunderbird. I contacted Yahoo and they said they couldn't help me. Thunderbird is set to read mail off of Yahoo every 30 minutes via POP3.
Chosen solution
you do not get the subtle differences in your terminology and mine.
POP has no inbox or any other folder. For convenience we often use the term inbox because those that know nothing about mail tend to understand the term inbox and it is a close enough fit.
In this case it is not close enough. Yahoo has a mail drop that pop collects mail from. POP has no folders and does not get mail from the inbox in reality. It gets it from the maildrop. That spam filtering is going on on the server is not known to the pop client, nor does the mail client (Thunderbird) know where the mail comes from. It asks for new mail and get it. If it does not get all the mail because the server is filtering what it offers we get support request here asking why mail from my mother never gets delivered.
My original point is no mail that arrives should not be shuffled off anywhere else in a pop mail situation. POP is fundamentally unsuited to server side filtering of any kind.
With IMAP you have folders. So you will get the mail anyway by subscribing to the spam folder (bulk mail at yahoo they have no SPAM folder).
With POP you only get the new mail offered. So any false positives in the spam are simply lost to you if the mail server does not offer all mail. That to me is unacceptable. You however apparently implicitly trust Yahoo to never get it wrong. They do.
Any questions about how yahoo spam filtering works you will have to direct to them. There is nothing in your support request that Thunderbird has control over.
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Thunderbird should get ALL mail yahoo thinks is spam, not just some of it. POP gets mail delivered to the "mail drop" that is Yahoo's servers in this case. For them not to offer all mail coming to the "mail Drop" and accepted by them for delivery is probably a violation of the mail standards.
The mail Yahoo flags as Spam is moved to the Yahoo Spam folder and is thus no longer in the Yahoo inbox. This prevents about 90% of spam flagged by Yahoo from ever reaching my Thunderbird inbox. However, some still gets through and I would like to understand why and stop it.
Chosen Solution
you do not get the subtle differences in your terminology and mine.
POP has no inbox or any other folder. For convenience we often use the term inbox because those that know nothing about mail tend to understand the term inbox and it is a close enough fit.
In this case it is not close enough. Yahoo has a mail drop that pop collects mail from. POP has no folders and does not get mail from the inbox in reality. It gets it from the maildrop. That spam filtering is going on on the server is not known to the pop client, nor does the mail client (Thunderbird) know where the mail comes from. It asks for new mail and get it. If it does not get all the mail because the server is filtering what it offers we get support request here asking why mail from my mother never gets delivered.
My original point is no mail that arrives should not be shuffled off anywhere else in a pop mail situation. POP is fundamentally unsuited to server side filtering of any kind.
With IMAP you have folders. So you will get the mail anyway by subscribing to the spam folder (bulk mail at yahoo they have no SPAM folder).
With POP you only get the new mail offered. So any false positives in the spam are simply lost to you if the mail server does not offer all mail. That to me is unacceptable. You however apparently implicitly trust Yahoo to never get it wrong. They do.
Any questions about how yahoo spam filtering works you will have to direct to them. There is nothing in your support request that Thunderbird has control over.