[Users] Duplicate messages in IMAP Sent folder

[edwardp at gmx.com]

On Mon, 14 Sep 2020 07:51:50 -0000
Paul <claws at thewildbeast.co.uk> wrote:

> Hi,
>
> In the network log commands sent to the server by Claws Mail utilise
> a > character, and messages coming from the server use a < character.
>
> We see in the log that Claws says "IMAP> 50 UID COPY 284229 Sent",
> that is copy one message. There server responds saying that it copied
> 2 messages:
>
> > [2020-09-13 18:17:21] IMAP> 50 UID COPY 284229 Sent
> > [2020-09-13 18:17:21] IMAP< * 1 EXISTS
> > [2020-09-13 18:17:21] IMAP< 50 OK [COPYUID 2 284229 291801] UID COPY
> > completed
>
> It is not clear where UID 291801 comes from, other than from the
> server.
>
> with regards
>
> Paul

Hi Paul,

I found https://support.mozilla.org/en-US/questions/1272065 pertaining
to Thunderbird, it appears to explain what is happening, which was
a somewhat-recent (late 2019) change. Users who were using POP, were
not having copies of their sent e-mails saved, so I guess this was an
attempt to fix that.

The legacy AOL accounts have a folder 'Sent Items', where the Yahoo
accounts do not. As a test, I went into Advanced and redirected sent
e-mails to this 'Sent Items' folder and sent a message. The sent e-mail
correctly went into this folder, but the regular IMAP Sent folder also
had a copy of it. So, if there were a way for Claws to automatically
delete the messages in Sent Items afterwards, it may fix this issue.
Yahoo Mail allows new folders to be created.