--On Monday, May 31, 1999, 9:31 AM +1000 Debra Wilson <[log in to unmask]> wrote: > because of our set up we require the use of an aliases file on a SunOS > mail server.... Unix is case sensitive and so [log in to unmask] is > totally different from Pete-Weiss@psu.edu...... and different again > from [log in to unmask] or any derivative or combination of upper case > and lower case letters..... they would be treated as totally unrelated > accounts... (unless we added in aliasing to point them all to the one > person so no matter what format was used, the mail would get to the > correct account) I'm aware of UNIX's case-sensitivity in general, however every sendmail installation I have seen automatically converts incoming mail to lower- case. In other words, mail sent to Pete-Weiss or PETE-WEISS would be delivered to pete-weiss. And most sites create their accounts in lower- case anyway, simply because it would be an administrative and support nightmare to have users with case variations of the same account string. In my experience using e-mail for the past ten years or so, I have never had a message bounce due to sending it to the wrong case, and I have often changed [log in to unmask] to [log in to unmask] Just for kicks, I sent a test message to [log in to unmask] According to my return receipt from your mail system, is was successfully delivered: ----- The following addresses had successful delivery notifications wilsond (successfully delivered to mailbox) (expanded from: <[log in to unmask]>) Anyway, I agree with Dan's earlier response, which was basically that they're in the RFC for backwards-compatibility with older mail systems that did this, although they are no longer common. I was asking my question more out of curiosity if anyone is really doing this anymore. Alan -- Alan S. Dobkin, Operating Systems Analyst Windows NT Group, Internet/Intranet Services University Systems Support, Emory University ITD