I have configured squid from source code and running as transparent proxy server everything is working fine browsing FTP caching. Email client from Thunderbird are able to connect SMTP server but outlook clients are not able to communicate with SMTP server on port 25 therefore i am using 587 for emailing.
I have another Squid server by outlook user are able to send emails using port 25. I am not understanding what is the issues.
Regards,
-Mansur