All Charter.net subscribers across all our hosted lists are generating the following error (only Charter.net is generating this error) [log in to unmask] Last error: 5.1.0 553 5.1.0 tr.wou.edu does not exist Our Listserv domain is tr.wou.edu which adds to my confusion on the error. Ordinarily I would interpret the error to mean the user ID no longer exists in Charter.net. However, the addresses are valid and I have communicated with the affected users. Charter's response to their calls was to deny the problem resides with them . Since I am woefully lacking in email server knowledge, can someone provide some direction that I provide Charter to send them on the path to a solution? ------------ Regards, Randy Klumph [log in to unmask] The National Consortium on Deaf-Blindness The Teaching Research Institute 345 N Monmouth Ave Monmouth, OR 97361 http://nationaldb.org