Thunderbird's junk filter will not take any notice of the sending email address. It is not relevant in the determination of what is junk. This is evidenced by spam email arriving addressed to your own email address, or that of immediate family members. The common use by spammers of harvested email addresses in the junk they send makes legitimate email and spam almost identical in the address field.

Perhaps the answer is to actually use the unsubscribe links on the email. There is some belief that using unsubscribe links confirms that the address is real. Seriously unwanted email is best managed dealing with the sender, not the delivery guy. Companies like wayfair generally are very cooperative about removing folk from their mailing lists. Their reputation is after all at stake if they are offering bad customer service.

If all else fails you can use a filter. https://support.mozilla.org/en-US/kb/organize-your-messages-using-filters and https://support.mozilla.org/en-US/kb/blocking-sender

I think you missed my point. IF I MARK IT AS JUNK, then Thunderbird should abide my decision. More like a 'black list' without me having to create it manually. I refuse to interact with any company so unsubscribing to something that I never subscribed to is not an option. Regardless what you say, it is phishing. Just like unsolicited phone calls. I don't answer ANY call without caller ID and even with an ID, I answer maybe 1/4 of those.

Perhaps I should have posed this as a feature request: one button black list.

ggrussell said

I think you missed my point. IF I MARK IT AS JUNK, then Thunderbird should abide my decision.

Did you miss the fact that it is not how junk filtering works? You can have any opinion you like on what should happen. Reality is that will not make it so.

More like a 'black list' without me having to create it manually.

I gave you a link on how to do it. That is how you do it.

I refuse to interact with any company so unsubscribing to something that I never subscribed to is not an option.

Regardless what you say, it is phishing.

Phishing inherently contains a intent to deceive. https://en.wikipedia.org/wiki/Phishing

Just like unsolicited phone calls. I don't answer ANY call without caller ID and even with an ID, I answer maybe 1/4 of those.

This is nothing like unsolicited phone calls. This is marketing mail to which you are subscribed and apparently think software should manage your unsubscription for you. The email probably has an unsubscribe link to your account on wayfair. It is a requirement of the canspam act if you are in the USA.

Perhaps I should have posed this as a feature request: one button black list.

You are about 18 years late. https://bugzilla.mozilla.org/show_bug.cgi?id=71413

Closed 16 years ago as wontfix, so I don't see it being a new feature any time soon.

I HAVE NEVER been to wayfair.com and never will. I can move on to other software that has REAL customer service. I KNOW how filtering works and Thunderbird does a lousy job at Junk/spam filtering.

No, one of your work mates probably subscribed you. Sort of practical joke.

But you are welcome to use whatever software you like. Perhaps you need to stay away from support done by your fellow users however. We do not get paid to be obsequious, so we just call it as we see it and are just a little jaded by threats about "well I will use competitor X". I recommend you use Microsoft. They provide your operating system which has a built in mail application and it is free.