I am on Zimbra 6.
I have configured external IMAP account in my users' mail. When ever they send mail using external account alias, it appears as from "_blank" in recipient's inbox instead that alias name/address
Although in Account's configuration the field
"From: Choose the name that appears in the "From" field of email messages" has been properly configured with required name and address.

Can someone please guide me where to look at.
Thank you.