On Fri, 04 Mar 2011 17:34:25 -0500 Bill Davidsen <davidsen@xxxxxxx> wrote: > I'm looking for a tool to validate email addresses, Good luck, lots of big mail systems are designed to make it very hard to scan for actual user names (spammers like that) so you are more likely to end up blacklisted than get answers. Perhaps instead of sending a 100K quarterly newsletter you need to send a short 'list cleaning, you must click to continue receiving under new ownership' mail ? and set up a web page for it. Chances are that'll somewhat shrink your list and save you a lot more effort as it'll filter the people who forgot about it or whose mail systems are blackholing your mail not bouncing it (which is increasingly common) Alan -- users mailing list users@xxxxxxxxxxxxxxxxxxxxxxx To unsubscribe or change subscription options: https://admin.fedoraproject.org/mailman/listinfo/users Guidelines: http://fedoraproject.org/wiki/Mailing_list_guidelines