Please can anyone help me with this.
I have have an ISA server 2004 on my network which i have been using as the proxy for over three years now. All have been working fine until recently the ISA server starts blocking POP3 and SMTP services occasionally.
Description.
I use a web-mail hosted by networksolutions and i connect my clients to access their mail using outlook 2007. they have been connecting without any problem till recently that i started getting call from the users that they can’t send or receive mail. the mail can be accessed when they log on to the web-mail using the web browser but not with outlook. If i restart the ISA server, the outlook will work for some minutes and then stop. if i restart again it will work for some minutes and stop, just this way. The configuration have been OK and was not tampered. i think something or a service is causing the POP3 and SMTP blockage. I have tried all i can to no avail. please can someone help?