Why can't I send pictures via email with my phone?

[AC Question]

I have tried to send pictures from my phone to email and they all fail.

 

[B. Diddy]

Welcome to Android Central! Which phone? Which email app? If you're composing your email, what happens when you tap the Attachment button (usually looks like a paperclip) and select a photo from your Gallery? Alternatively, you could also go to the Gallery first, select the photo, then tap the Share button, and select which email app you want to use to share the photo. Then compose the email. Do either of these methods work? If not, where does it seem to be failing?