At 11:53 05/20/2002 Monday, Manuel Fernandes wrote:
 >I sent a message to the listserv group Friday (a few weeks ago). I
 >received a message from the software saying it had successfully been
 >delivered; however, several of those people did NOT receive the message,
 >including my own personal email account.
 >
 >Last week:
 >Despite a message telling me that the message had been successfully
 >delivered on Friday, I sent individual messages to each person on the
 >listserv and they DID NOT GET THE MESSAGE. Also, at least ten of them
 >told me they have NEVER received a message, at all!

This is a MAJOR clue, and it pretty much says that this is NOT a LISTSERV
problem, but some sort of mail-related problem (insert 100 reasons here).

 >I have read manuals on the site but cannot figure out as to how I should
 >approach this problems. I would appreciate any help and tips possible.

Do not approach this as a LISTSERV problem.

I would suspect that this is due to either misconfigured DNSes, or MX
hosts, or some aggressive A/V software, or change of email addresses, or ???.

--

Some of the things that I've learned about email:

1) email is NOT symmetrical: just because I receive an email from you,
does not mean that you can receive an email from me

2) email is NOT real-time i.e., it may be hours, days, or weeks before
you receive or read my email

3) email (message) is NOT necessarily the truth

4) email messages can "live" longer than you do i.e., hoaxes have
travelled several times around the planet; your nastygram about your boss
can actually be forwarded by a detractor to your boss

5) email is NOT reliable i.e., it may not ever reach your intended
recipient due to a constellation of reasons, some by human screwups, and
some by foul-play

6) email is NOT necessarily received in the order sent

7) email when received in the order sent is not necessarily READ in the
order sent

8) email has reached mission-critical stature among organizations,
governments, and institutions

9) email is like a post card sent through "snail" mail -- you don't
necessarily know who has read it along its way to your recipient unless
of course it has been encrypted

10) email is email, netnews is netnews, and the WEB is the WEB i.e.,
though they may share elements in common, they are all different in both
subtle and not so subtle characteristics

/Pete Weiss
Sr. Systems Engineer for Teleprocessing
Penn State




/Pete