Duplicate mails in Sent folder - IMAP - Thunderbird

Hello:

I'm using my own domain account (with outlook) with Thunderbird using IMAP protocol,

Everytime I sent an email I got duplicates in my Sent folder, both in Thunderbird and outlook.com account, among this issue my Sync is working fine so far.

I really don't know what else to do, I verified all the settings and are fine, 

Any ideas what else can I do?.


Regards
 

Question Info


Last updated October 30, 2019 Views 9,206 Applies to:
Answer
Answer

It is not necessary to save sent messages when using IMAP.

The Gmail setting in Thunderbird is

On the Copies & Folders tab in the When sending messages, automatically section:

Place a copy in > leave unchecked

 

https://support.google.com/mail/answer/78892?hl=en

 

Try the same setting for the outlook.com IMAP account.

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