Duplication of 'Sent Emails' when sent from iPhone?!?

Duplication of 'Sent Emails' when sent from iPhone?!?

Hi,

I have configured Zoho mail on Thunderbird on my laptop and on my iPhone using IMAP settings.

Whenever I send an email via my iphone, there are 2 copies of the same email saved in the sent mail box, but when I send an email via thunderbird or via logging in to Zoho mail on my computer it works perfectly fine.

I dont want my clients to get multiple emails nor do I want sent mails taking up space on the server.

Please help!

Regards,

Prateek