[deanhills]

The traditional mail servers like gmail, yahoo, hotmail, rediffmail, etc.  have a benefit in some web registrations. Some webmasters whitelist these emails rather than black listing the bad one. So a new email domain has difficulties in early times. I don't know whether these emails can be used in most websites as now registration and verification methods are much changed. Hopefully they can survive the huge competition from the giants.

Excellent point @Littlemaster  But it probably wouldn't do any harm to try and get a unique e-mail address with them, so that when onmail becomes successful and whitelisted one then has a unique email address to use.  Instead of registering for the first time and then find one's unique e-mail address has already been taken.  I'm planning on doing that.  And then to keep the e-mail address alive for special projects until I trust it enough to make it a main e-mail address.