In dealing with error messages I came across several examples of this, new to me, 8BIT SMTP extension not supported, message. In addition to this UK site the address [log in to unmask] was also affected. What does this mean? Does it imply that no future listmail can be sent to these sites and that I will have to delete all subscribers at each? As you can see from these questions I am not a "techie" so keep your answers simple, please. Judith Hopkins, Listowner of Autocat@ubvm ULCJH@UBVM (BITNET address) [log in to unmask] (Internet address) ----------------------------Original message---------------------------- --> Error description: Error-For: [log in to unmask] Error-Code: 0 Error-Text: 554 8BIT SMTP extension not supported Error-End: One error reported