Randy Ramsdell <rramsd...@activedg.com> wrote:

Using sendmail without certain areguments will cause the To: field to
show up as <undisclosed recipients:>.


Nothing would make sendmail write a bogus header like that one. That is
not a valid email address. This is valid:

To: undisclosed recipients:;

It's the list syntax with a null list. The name of the list (undisclosed
recipients) has no < > marks. The addresses in the list would be between
the colon and semicolon and each would be in < > marks.

The malformed <undisclosed recipients:> is probably a good clue to tracking
down what software is involved. Most mail software would not write that.


Joseph Brennan
Columbia University Information Technology

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