I am receiving emails through POP3 account without any problems. When I am trying to send email to the same SMTP server as POP3 server, I receive a window which asks me the password and domain name. I am connecting to the mail account on a Exchange Server 2000 from my company by using a ISP local number and a dial-up connection. If I input the password again, the email is sent. How can I disable this window to not appear every time when I am trying to send emails? When I press send and receive button I think Outlook Express 6 is trying to send and after that to receive. That's why is trying to authenticate me first for sending. I completed the steps for Incoming Mail Server to login with my account and my password (with remember password) and for Outgoing Mail Server to login also with my account and my password (with remember password). I checked the option My Outgoing Mail Server require Authentication. Why do I still receive that window for password and domain name? Thank you, Monica ********************************* Is this the answer to my question? With the POP before SMTP method, the user must first identify himself/herself as a rightful user by first receiving incoming E-mail with mail software. Then, only the rightful user will obtain authentication to send E-mail. Do I have to disable on Send page , Send messages immediately? <http://www.spinnet.jp/man/pbsmtp/wine/pbs_we_ol60.html> http://www.spinnet.jp/man/pbsmtp/wine/pbs_we_ol60.html Thank you.