When you use an image for your email address users will have to manually re-type it to their email client as it can't be copied. However that's a small price to pay for keeping your address away from spammers. Don't try to overcome this limitation by mapping the image of your email address to a Mailto link. That would directly expose your address to spammers and defeat the whole purpose of the exercise.
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convert email addresses to fancy font graphics but can convert whole slabs of text as well, You can download the resultant image or access it via a unique URL. To ensure privacy, you can also elect to have all traces of your converted text removed from their server