What you are seeing is normal.

Yahoo realise you are using Pop. Any email you send will only be seen in the Thunderbird pop mail account, but not on the server. So if you were to logon to webmail then you would not be able to see any emails you sent via thunderbird pop mail account. To ensure you are able to see sent emails when you logon to the yahoo webmail, yahoo have put those emails in the Inbox. This is a recent decision by yahoo.

This means when pop account access server, you end up with copies of your sent emails being downloaded to the pop account Inbox.

Options: You could see if it possible to set up a filter in the webmail account to move emails 'From' your email address into the server 'Sent' folder. Then they would not get downloaded, but would be visible in webmail in 'Sent' folder.

If this cannot be achieved then set up filter in thunderbird.

Alternatively: In Thunderbird create a Message Filter to run when 'getting new mail' select: 'Filter before Junk Classification' 'Match all of the following' 'From' and 'contains' your email address 'Move Message to' select the deleted folder on pop mail account or select: 'Delete Message'

I do not believe this issues has been characterized sufficiently, with all due respect to the OP and Responder. Perhaps I have a different issue, but it really sounds like the "same" matter.

Using T-bird 60.90.1 (32-bit) AT&T / yahoo eMail with a pacbell.net domain; set up as POP account

The issue was noticed today, 11/10/19, but appears to have started some time near the end of October. This account has been used for years.

Issue: When I create an eMail with T-bird on my local computer and send it to another one of my accounts, a copy shows up on the Yahoo mail server in the "Sent" folder of the sending account. Not in the "Inbox" as stated by the OP.

Every test eMail that I send has the exact same result. Almost like a hybrid IMAP account, but there is no specific "sync" action being performed. I am not sure if this is a new Yahoo feature or some changed T-bird setting. I am investigating the settings in the "Copies & Folders" section of my account in T-bird. I did not specifically change anything, and this has been operating as I wanted for a number of years.

I can find no applicable settings for the webmail of Yahoo. This is really not a desirable feature and is the reason I have set up a POP account. Toad-Hall stated "Any email you send will only be seen in the Thunderbird pop mail account, but not on the server." I completely agree that this is the way things should operate, but something has changed. It is NOT the way things are operating now.

I have attached a screen shot of the T-bird configuration in question. I have no comparable capture prior to this issue, but have not made any overt configuration changes to this area in a number of years.

Thank you for any additional insights.

You are correct; I meant the Yahoo "sent" box. I corrected the original question.

whodatrx7 said

I do not believe this issues has been characterized sufficiently, with all due respect to the OP and Responder. Perhaps I have a different issue, but it really sounds like the "same" matter. Using T-bird 60.90.1 (32-bit) AT&T / yahoo eMail with a pacbell.net domain; set up as POP account The issue was noticed today, 11/10/19, but appears to have started some time near the end of October. This account has been used for years. Issue: When I create an eMail with T-bird on my local computer and send it to another one of my accounts, a copy shows up on the Yahoo mail server in the "Sent" folder of the sending account. Not in the "Inbox" as stated by the OP. Every test eMail that I send has the exact same result. Almost like a hybrid IMAP account, but there is no specific "sync" action being performed. I am not sure if this is a new Yahoo feature or some changed T-bird setting. I am investigating the settings in the "Copies & Folders" section of my account in T-bird. I did not specifically change anything, and this has been operating as I wanted for a number of years. I can find no applicable settings for the webmail of Yahoo. This is really not a desirable feature and is the reason I have set up a POP account. Toad-Hall stated "Any email you send will only be seen in the Thunderbird pop mail account, but not on the server." I completely agree that this is the way things should operate, but something has changed. It is NOT the way things are operating now. I have attached a screen shot of the T-bird configuration in question. I have no comparable capture prior to this issue, but have not made any overt configuration changes to this area in a number of years. Thank you for any additional insights.

I have discovered the exact same issue and have to say that whoever buggered up a perfectly good system should be shot!

I even created a Sent folder on my Local Folders and changed the account settings to save sent emails to this folder which worked...BUT I discovered that the email is still on the Yahoo server in their Sent folder so how can you stop this happening!!!!

Yahoo are putting it in the 'Sent' folder on the server. They know you sent the email because you used their smtp server. This has nothing to do with Thunderbird. Thunderbird POP accounts cannot access any folder on server to put emails on server because pop account folders do not synchronise with server. They are doing it because they understand that people using POP will not have a copy on the server if on occasion they use webmail. If you use IMAP then it is on the server because imap accounts store all emails on the server.

Thanks for your reply.

What annoys me most about the change made by Yahoo was that didn't tell anyone so suddenly my email being sent by Thunderbird is appearing on the Yahoo server in the sent folder and you start to think if it is a problem with Thunderbird.

At least I now know what has caused the issue and can work around it to prevent my local sent emails being put onto the yahoo server.

Toad-Hall said

Yahoo are putting it in the 'Sent' folder on the server. They know you sent the email because you used their smtp server. This has nothing to do with Thunderbird. Thunderbird POP accounts cannot access any folder on server to put emails on server because pop account folders do not synchronise with server. They are doing it because they understand that people using POP will not have a copy on the server if on occasion they use webmail. If you use IMAP then it is on the server because imap accounts store all emails on the server.

T-H, I completely understand and was not, or did not mean to, blaming Thunderbird. My original thought was that I had done something incorrectly in T-bird configuration or the account got changed to an IMAP one. I checked all this out, also replying to an original poster, about my experience. If I cared about having my SENT eMails always available, I would use an IMAP account. I choose POP and expect that normal conventions will apply.

Yahoo has changed their policy, against normal conventions. They are presuming I don't know what I want or am too clueless. maybe other areas, but not this one. If I wanted all my eMails on a global server, I would use their webmail completely.

Yahoo (w/ AT&T) has a poor customer service interaction. I wanted to clarify some things in this forum before I make my final decisions. I will approach Yahoo / AT&T and get their take. There is not configuration setting in the webmail app, so it may not be changeable.

As I have my own web site that includes eMail, I may just go that route. I have had the same eMail addresses (identities) for years with Yahoo / AT&T, but, perhaps it is time to drop, even given all the effort to change. Besides, I can drop one particular Internet service and save some money.

Again, T-H, I thought it might have been a T-bird setting that got messed up. Sad part is yahoo doing things that are out of the norm and not presented to users. Just about anyone using POP, or knowing what it is, already knows T-bird "sent" msgs do not normally get posted to a webmail server. I think my mind is made up!

DWA058 said

Thanks for your reply. What annoys me most about the change made by Yahoo was that didn't tell anyone so suddenly my email being sent by Thunderbird is appearing on the Yahoo server in the sent folder and you start to think if it is a problem with Thunderbird. At least I now know what has caused the issue and can work around it to prevent my local sent emails being put onto the yahoo server.

Given what T-H has said and the way Yahoo operates, I doubt you can prevent this from happening. T-bird always had a local "Sent" folder for me. And that's where the msgs stayed - locally.