John Lyon writes: > Whatever is going on has nothing to do with Listserv. If a mail server will not > relay mail to it's own domain then it is misconfigured. Send us some error > messages. Here is a typical error: Jim Allison <[log in to unmask]> Last error was: Mailer com said: "550 <[log in to unmask]>... we do not relay [log in to unmask]" Now - I'm pretty used to getting these, and how to handle them, but I'm especially concerned by the verbiage: Last error was: Mailer com ^^^^^^^^^ "Mailer com" normally contains a server name of the server refusing to relay the mail. And all the accounts erroring out use this exact verbiage - "Mailer com" as the offending server. These are not confined to @HOTMAIL.COM accounts, but are spanning across the board and different ISP's. Too many to make a broad brush assumption that it is a single ISP having some trouble. Best Regards, Sue Smith Co-Owner Whippet-L [log in to unmask]