Hi, If you know the ip range from your internet-provider, type this: For example if you provider have IPS from 199.200.101.1 to 199.200.101.254, the line in tcp.smtp file will be: 199.200.101.:allow,RELAYCLIENT="" In the last case, all subnets from this internet-provider will be informed. Best regards, Agnaldo Mariano Monteiro Engenharia de Sistemas Fujitsu do Brasil Ltda. Tel.: (11) 245-0964 (Direto) [EMAIL PROTECTED] ----- Mensagem original ----- De: Severin Olloz [SMTP:[EMAIL PROTECTED]] Enviada em: terca-feira, 14 de agosto de 2001 13:53 Para: [EMAIL PROTECTED] Assunto: stop relay messages :-) Hello... OK now stop-smtp-relaying works :-) I can allow relaying messages over my smtp-server for some IP-adresses (/etc/tcp.smtp), but how can allow relaying for all clients of a internet-provider? .aol.com:allow,RELAYCLIENT="" doesn't work!? Any ideas? Thanks very much for your help: Severin Olloz