[Users] Duplicate messages in IMAP Sent folder

[edwardp at gmx.com]

When sending an e-mail from either Yahoo or AOL, I am finding two
copies of the same e-mail in the IMAP Sent folder for the account.

The only difference is that one of the messages displays additional
headers:

Received by: (with the address of the Yahoo/AOL SMTP server)
X-SMTP-MAILFROM:
X-SMTP-RCPTTO:
References:

This doesn't occur with any of the other IMAP accounts. Is there a
setting in Claws that will prevent this duplicate e-mail from saving
in the Sent folder?

Thanks in advance.