>  There is a puzzling issue with a listserv I am currently managing,
>[log in to unmask]   Some subscribers have written to me to say
>that they are receiving triple copies of messages posted to the list.
>(These subscribers are subscribed with only one email address.)  I am at a
>loss to explain why this is happening.  Do you know of a recent glitch in
>the listserv systems?  Is there something I can do to help fix the problem
>on my listserv?

In these cases it always requires full-headers of the RECEIVED messages in order to properly debug the problem.

The rest is speculation.

/Pete