I tested EnScrypt 1.05 on a few emails. The first was a very short email (the body was "test: I hope this works). The app encrypted and decrypted this email pretty readily.

I then encrypted a 32 Kb email--a summary of headlines from the New York Times. It took a longish time to encrypt--2-3 minutes--but the app got there in the end. I forwarded the encrypted email to myself, noting that it was now about 62 Kb in size.

When I tried to decrypt the email...well Enscrypt never finished the job, even after 10 minutes. I encrypted the email three times and tried to decrypt three times. On each occasion, EnScrypt seemed to bog down. I had to force quit Mail each time because I'd lost control of Mail's GUI. Arggh.

I'm using a 933 Mhz G4 Quicksilver with 768 MB RAM and 10.3.8. I can't imagine that decrypting a 62 Kb email with fairly simple plain text formatting and no HTML really requires all of my machine's resources for 10 minutes or so. Maybe something was wrong with the unencrypted email to begin with...but I don't think so.

On the plus side, EnScrypt is a good way to go if you don't want to obtain a certificate from Thawte or others. Just keep your emails short when using EnScrypt.