On Sun, 17 Mar 1996, Bert Van Vliet wrote:

I'm trying to get in touch with Firehawke.  He recently sent me some email,
and I've tried to reply, but I keep getting this:

... while talking to bbs.yab.com.:

RCPT To:<firehawke@bbs.yab.com>

<<< 550 User is not allowed to receive internet email.

Anybody know what gives here?  o_O??

Yeah.  His account was deleted.  550 is the error code for User unknown.