how can i change font in iphone email editor?

1. Select and cut the entire email text.
2. Go to Calendar.
3. Click the plus to make a new appointment.
4. Paste the text to the notes section.
5. Select and copy all the text.
6. Cancel out of Calendar.
7. Paste it back to the email.

It will be a different colour, but it will all be the same size :-)

great thanks; this worked for me.

THat was really awesome, thanks from my heart

try this:

1. paste URL

2. shake device and select 'undo'

that should undo the automatic format change, I used it to edit my signature.

This worked for me. It's not really a fix but a nice workaround with an native iPhone app