I am using Office 2013 and use the send document as attachment option within Word to email documents. The documents that I email are from a shared exchange mailbox. Whenever I do this the emails get through to the receiver but are stuck in my personal outbox rather than sending and heading to the shared sent box.

This only occurs when I use this option from Word, eg: I can send Excel attachments from within Excel and it goes to the shared Sent box.

I am also able to successfully send emails from with Outlook via the shared account.

I am unable to find any settings in Word that affect this behavior, any ideas?

Hi,

Please run Word in Safe Mode to test if it's 3rd-party add-ins related:

Press Win + R and type word.exe /safe in the blank box, then press Enter.

If theres no problem in Safe Mode, disable the suspicious add-ins to verify which add-ins caused this issue.

We can also refer to the link below, to learn more and check the possible settings that may affect this behavior:

http://www.msoutlook.info/question/278

Regards.

Melon Chen
TechNet Community Support

I'm having a similar problem. When sending an attachment from Word 2013 (using Share, Email, Send as Attachment), the email goes to my outlook.com outbox instead of the outbox of the account I'm using for sending the email. The email most of the times is still sent, and appears as going out of the correct account, but still gets stuck in the outlook.com outbox. This problem doesn't happen when using Excel 2013, or when I use my outlook.com account in the From field of the email (which is not a solution as I need to use my work email account for sending).

I tried Word in Safe Mode as suggested above, and the problem is still there.

Same problem here. Message stuck in outbox but actually sent.  I can send the saved word file as an attachment just fine so it has nothing to do with the attachment.