[Mailman-Users] Mail not reaching everyone on mailing list

[Ira Rosenblum]

Last week I wrote that none of the mail (using Mailman 2.1.6) being  
sent to my list was reaching the list members, but I have since  
discovered that about 25% of the members (that's a rough estimate)  
are receiving mail, while the rest are not. It makes no sense to me.  
The list has about 310 names on it, most of which were mass  
subscribed by my cutting and pasting e-mail addresses (as text only;  
I removed the hyperlinks from them first) from an excel spreadsheet.
Last week, Mark answered by asking: Have you checked Mailman's 'smtp'  
and 'smtp-failure' logs? Also, the error log?
I don't have access to the logs. I've asked someone who does to  
check, but I haven't heard from them yet. Meanwhile, does this make  
any sense at all, that the mail is so sporadic? Has anyone else had  
this problem, and if so, how did you resolve it?
Ira