Mavericks Mail: Email is stuck in Outbox if there are two SMTP accounts configured and one of them is offline
I have two POP Emails accounts setup on my Mail with (obviously) two separate SMTP accounts. Sometimes, one of my SMTP accounts is inaccessible/offline. When I try to send an email with the account for which the SMTP is working, the email is stuck in the Outbox perpetually.
When both accounts are online, I don't face an issue.
Workaround: If I delete the offline SMTP server from "Edit SMTP Server List", the email is sent successfully.
Any help would be appreciated.
MacBook Pro, OS X Mavericks (10.9.2), OSx Mail