Question: Can anyone recommend an iOS email client (Exchange/ActiveSync or IMAP... preferably both) that supports really sweet email signatures? Our company email signature has an official format that has a base64 encoded image and a standardized font/color.

Please, throw me some suggestions!

Answer: 
[Moxier](http://www.moxier.com/)
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This is an email client which supports Exchange ActiveSync in the AppStore. But I'm not sure it supports sweet email signatures.
try Mail+ for Outlook by iKonic Apps...best email client out there