Must a user authenticate with the entire email address on devices?
Question asked by Connie DeCinko - June 1, 2016 at 3:05 PM
I know that I can go to the web interface and use just my username, not the full email address, to login to my account.  Can the same be done when setting up say a mobile device?
The main reason I ask is if we take the users from our old iMail system, where they only have say Joe.Blue as their username and import them as Joe.Blue@company.com?  And then for the user, the change is transparent if they can continue to connect with just Joe.Blue?

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Bruce Barnes Replied
June 1, 2016 at 3:28 PM
Short answer: If you host multiple domains on the same IP address, or they all use a common login page, yes. There are also other solutions, just search the forums for "logins"
Bruce Barnes
ChicagoNetTech Inc

Phone: (224) 444-0169

E-Mail and DNS Security Specialist
Network Security Specialist

Customer Service Portal: https://portal.chicagonettech.com
Website: https://www.ChicagoNetTech.com
Security Blog: http://networkbastion.blogspot.com/

Web and E-Mail Hosting, E-Mail Security and Consulting
Scarab Replied
June 1, 2016 at 4:11 PM
We faced a similar dilemma with an iMail migration to SmarterMail about a year ago. We setup different IP Addresses and Hostname bindings in SmarterMail for each iMail server that was migrated so that existing users could continue to login using just the first part of their email address as the User Name even though we were hosting hundreds of different domains on the same server. When we pointed DNS for those iMail domains to the new SmarterMail Server there was nothing that needed to be done client-side on previously configured devices or email clients, everything just worked! The only thing Tech Support needed to do was help webmail users who had the learning curve of a new interface. It was a huge time-saver for Tech Support to do it this way.
The only sticky widget for us is that we generally redirected all HTTP traffic for all of our domains to HTTPS on the Mail Server's primary Hostname. We had to make some creative URL Rewrites to exclude the old iMail domains from this redirect so that they could continue to login to webmail with just the first part of their email address as the username. 

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