Hi Frnds, I have my Exchnage server 2003 installed, i have many users who will access mails from outside network through internet. for that i want to configure POP3 protocol to access outside network. please help me to configure it. Thanks in Advance, Mahi Jhala

Make sure pop3 virtual server is running. Open port 110 on your firewall and forward it to your Exchange server. It's recommended to use SSL and open secure POP3 on port 995 as basic authentication will send credentials in clear text. Go through article below, ignore the ISA part at the end if you're not using it. Secure Exchange Server 2003 POP3 Publishing http://www.msexchange.org/pages/article.asp?id=583James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hi James, Thanks for you Reply, I have done the configuration on server, i can telnet on port number 25/110/995 from outside. but when i am trying to configure outlook from outside network i can pass the pop3 login test in outlook 2007 but fails in SMTP. please help me. Thanks in Advance, Mahi Jhala

If you want to connect to SMTP please use Client SMTP Port 587 and make sure that the encrypton methos is configured correctly on the client. (so that it corresponds to the configuration of the client smtp service on your Exchange system). regards Thomas Paetzold visit my blog on: http://sus42.wordpress.com

Hi, when i am tryong to configure MSoutlook from outside users it gives below error in SMTP testing. Send test e-mail Message: The Server Responded: 554 service unavailable; i am not able to configure outlook due to this error. Thanks, Mahi Jhala

what does telnet tell you. What happens if you try a telnet connection on tcp port 587? regards Thomas Paetzold visit my blog on: http://sus42.wordpress.com

You're using 2003 so it defaults to port 25 for SMTP. In outlook did you set SMTP to authenticate you, outgoing server tab, my outgoing server requires authentication? Also your might be blocking port 25.James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Do you really what to use tcp Port 25 without authentification? I think this is not a good idea otherwise if you want to configure a Spam relay Server. feel free. regards Thomas Paetzold visit my blog on: http://sus42.wordpress.com

Hi James, I have tried by using the option suggested by you but i am still getting error but the error is changed as below. Send test e-mail Message: You Outgoing SMTP e-mail server has reported as internal error. if you continue to receive this message, contact your server administrator or Internal Service Provider(ISP). i am using the default port number 25 for my outgoing server and i can telnet it from outside also. plese suggest me what i have to do. Thanks in Advanced, Mahi Jhala

Hi Paddy1st, as you suggest i configured outlook with 587 port as outgoing port and my outlook configured successfuly. but i am not able to send an email from my outlook. i am geting error that your message is undelevarable. please check the error below. Your message did not reach some or all of the intended recipients. Subject: FW: Testing Email Sent: 2/25/2011 2:59 AM The following recipient(s) cannot be reached: 'Username@Domain.com' on 2/25/2011 3:00 AM 550 5.7.1 Unable to relay for Username@Domain.com Thanks in Advanced, Mahi Jhala

Do telnet test and see if you can authenticate with your credentials. http://www.kongtechnology.com/2008/01/27/smtp-authentication-and-send-emails-using-telnet/James Chong MCITP | EA | EMA; MCSE | M+, S+ Security+, Project+, ITIL msexchangetips.blogspot.com

Hi, I have successfully configured my outlook from outside through 587 port (SMTP) and with My outgoing server requires authentication option. Thank you all Mahi Jhala