On 10 Feb 2004 at 10:47, Alun wrote about
"Re: [Exim] Ignoring bounce messages":
|...
| Unfortunately, there *is* a big gotcha - vacation messages. These have a
| sender of <> and quite legitimately don't have any headers included.
Yup, I just discovered that yesterday. The other example I ran into
was delivery receipts. At least some MTAs generate these with the
null sender.
|...
- Fred