Check the tcpwrapper and qpopper log files to see if any error messages are present.
Most likely there is a DNS problem at your customer's end and the error messages will fully explain what is happening. I see this all the time where Butch At 12:33 PM 10/2/01, you wrote: >Hi >I am using qpopper 4.0.3 with Sendmail 8.9.3 running on Solaris 8. some of >the clients Popping mail from Out Side the Contry Are not Able to POP >Mails with Windows giving error Messages Unexpected Error. There are some >ISPs from where clietns are unable to POP there mails > >Its very urgent so solve the problem, looking for your reply > >Ayaz TSTAR Internet, Inc | Making the Net Work Marble Falls, TX | Serving Blanco, Burnet, 830-693-6967 | Llano, and Mason Counties
