Now, correct me if I'm wrong, but... I see ALL this debate about what RFC822 should and shouldn't do with backslashes and unbalanced parens and all the rest.. But.... I was told (a long time ago, it may have changed) that the Croswell Mailer is an RFC733-based mailer. If so, it doesn't matter *what* RFC822 says about it, if it isn't valid RFC733 as well, it will get punted or worse. Striving for RFC822 compatibility is nice. However, most days I'm convinced that the only way RFC822 will fly is to SHOOT all the non-domain UUCP sites with their silly left-associative '!' and SHOOT all the RFC733 mailers. You think silly backslashes are trouble, try deciphering an address of the form [log in to unmask] This is the REAL problem. And yes, there are several ways to interpret it. And they are not equivalent. Valdis Kletnieks