message delivered to list but altered for some

A message is delivered to all list members, but some members get full
message, while some a very abbreviated message with much of message not
included. (There are many links in message but this has not been an
issue previously.) I cannot now ascertain how many recipients fall into
each category. I assume those who get only part of message may have
something in common on their end, but it seems to be a quite significant
number and I cannot identify.
Is there anything on my admin or server settings I should be looking for?
I am sure I read this before in list but cannot find in archives, must not be using correct search terms.
Thank you.
Michael

Michael Rainey wrote:
It's hard to even guess what's going on without seeing the raw message as received from the list.
Possibly there is something broken in the MIME structure of the message either as sent to Mailman or broken by Mailman, but without the raw message, I can't even guess.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan

Michael Rainey wrote:
It's hard to even guess what's going on without seeing the raw message as received from the list.
Possibly there is something broken in the MIME structure of the message either as sent to Mailman or broken by Mailman, but without the raw message, I can't even guess.
-- Mark Sapiro <msapiro@value.net> The highway is for gamblers, San Francisco Bay Area, California better use your sense - B. Dylan
participants (2)
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Mark Sapiro
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Michael Rainey