[nextos]

Zoho is interesting in the sense that it is one of the few email providers I know of that lets you use a custom domain with one of their free plans.

Very startup friendly. Also free POP/IMAP, so you are not locked in.

[iosjunkie]

That used to be the case. You can still get free email hosting, but POP/IMAP needs a paid plan.

[vee-kay]

Zoho's plans are very affordable and friendly for startups.

That affordability, quality and service is why Indian government is migrating its IT dependencies from Microsoft to Zoho.