mailman list messages being rejected by spam experts?

Hi all,
I have a couple of lists set up through my hosting provider.
One list with less than 200 members has most messages sent to it rejected by spam experts and the user gets an error message saying the message was rejected because it had a high probability of spam.
Another list I have with over 200 people has no issues. I haven't made any changes to either list so think it is something spam experts have done.
My ISP has been trying to work this out for over a week.
Any suggestions?

On 04/09/2016 06:58 PM, Adam Morris wrote:
I have a couple of lists set up through my hosting provider. ... I haven't made any changes to either list so think it is something spam experts have done.
My ISP has been trying to work this out for over a week.
Any suggestions?
Yes. Keep working with your ISP. Presumably, SpamExperts is filtering all mail before it ever gets to Mailman, so unless it is actually filtering by recipient, there should be no difference.
Possibly each recipient address (list) has it's own SpamExpert settings and one list has a tighter setting than the other.
Possibly it has to do with the subject matter of the two lists.
participants (2)
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Adam Morris
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Mark Sapiro