I am a co-owner of a list with between 500 and 600 subscribers,
depending on the time of the year. In the last year the two
co-owners had to set quite a large number of subscribers to NOMAIL,
due to unstable mail servers.  Also, quite a large number of
subscribers set themselves (temporarily) to NOMAIL. I find, that,
when sending a message, the message is send to approx.  360/370
subscribers. Reviewing the list shows there are about 520
subscribers.  Could anyone of you tell me how to obtain a list of
the "to NOMAIL set" subscribers, so I can check, by regularly doing
such, whether it is temporary or just a forgotten subscription.
Greetings from Kooi.