On Apr 12, 2006, at 12:50 PM — 4/12/06, Sheila Fredrickson wrote:

> There is something very strange going on with our Listserv ...
>
> Since about two weeks ago, mail delivery has gotten extremeley  
> slow.  Now we
> are getting mail in "spurts."  Mail is sometimes held for several  
> hours
> until a collection of it arrives all at once, with the same "sent"  
> time on
> all in that batch.
>
> LSoft Tech Support had us check out several things but we have been  
> unable
> to discover the cause.  We are on a leased server and our provider  
> doesn't
> know what it is, either.  Listserv logs show all leaving the server  
> within a
> couple of minutes so it does not look like a Listserv problem.  It  
> seems it
> is being held somewhere and then something triggers it to be sent.
>
> Anyone seen anything like this before and if so, what did it turn  
> out to be?

Check the headers of outgoing messages that were delayed. In fact, I  
suggest you subscribe to your lists via two more more outside email  
addresses such as on hotmail and gmail. That way, when problem occurs  
again, you can see what the headers to those subscriptions look like.  
Look for any indication of a long gap in time between a pair of  
servers in the header. i suspect that if you take this approach, you  
will find that one of the servers that sits between your Listserv and  
your test subscriptions is the culprit.