yes i am using SMTP Authentication , but when i m doing telnet to my server on 25 port so i am able to send mail by unknow user that in in not my mail server like mail from: <abs at domain.com> this command is showing Sender is ok while its not user in my mail server.after that rcpt to: <xyz at domain.com> DATA jhsjhdf . quit after this mail is queued for delivery to xyz user and in this scenario xyz is valid user accound on my mail server so i want that unkown account for my domain cant sendmail , so how i will do that , when i am sending mail to out side domain without authentication then everything is ok means any one can send mail to my domain while he is not user. this is the problem. i have one solution , but i want to know very easy way to do that . --- Feizhou <feizhou at graffiti.net> wrote: > abhishek singh wrote: > > hi > > all > > i am using sendmail mail server, i have configured > > SASL+TLS+MailScanner+Spamassasin+.Procmail and its > > working fine, but there is one problem when i am > doing > > telnet to my server on 25 port and using "mail > from " > > command to send mail by any user like > abc at gmail.com or > > any user @mydomain then sendmail is not able to > verify > > sending user , so plz help me how can i verify the > > real sender means i want only my domain real user > can > > sendmails .and when i am using mail clients then > its > > working fine . prolem is occuring when , when i am > > doing telnet directly to smtp port to my server > > Did you use AUTH to authenticate yourself? > > Also, from what you say, do you also want to make > sure that any user who > authenticates must use an email address in your > domain as their return-path? > _______________________________________________ > CentOS mailing list > CentOS at centos.org > http://lists.centos.org/mailman/listinfo/centos > __________________________________________________________ Yahoo! India Answers: Share what you know. Learn something new http://in.answers.yahoo.com/