One of my subscribers has contacted me to say that he is no longer receiving list messages. I have checked is his subscription and everything is as it should be. His email address is a school based one and his network administrator contacted me to say that list mail was being filtered out by their spam filter (McAfee). They say they are not able to control this since Listserv continually changes its IP address. Is this correct?
 
 
To be truthful I not very familiar with spam filters. I wondered if anyone had experienced a similar problem with one of their lists or could offer any advice. 
 
Many thanks
Ingrid Walker