UserAgent: Mozilla/5.0 (Windows NT 6.1; WOW64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/48.0.2564.103 Safari/537.36

Steps to reproduce the problem:
1. Compose an email and send to an existing address with the wrong domain e.g, johnsmith@gmai.com instead of johnsmith@gmail.com
2. 
3. 

What is the expected behavior?
There are many domain names and i think it would take alot of effort to validate the address before sending, i think the best is just sending the user a notification of message not delivered and suggest for the to confirm if the address is correct instead of retrying to send it for 2 more days. Or give option to cancel the retrial.

What went wrong?
Received this email for notification thrice
"This is an automatically generated Delivery Status Notification

THIS IS A WARNING MESSAGE ONLY.

YOU DO NOT NEED TO RESEND YOUR MESSAGE.

Delivery to the following recipient has been delayed:

     irenemweu@gmai.com

Message will be retried for 2 more day(s)

Technical details of temporary failure:
read error: generic::failed_precondition: read error (0): error"

Did this work before? N/A 

Chrome version: 48.0.2564.103  Channel: n/a
OS Version: 6.1 (Windows 7, Windows Server 2008 R2)
Flash Version: Shockwave Flash 20.0 r0