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Secure POP (SSL POP) uses port number 995 and not 443, which is https.
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Secure POP (SSL POP) uses port number 995 and not 443, which is https.

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Secure SMTP and Secure POP3 is supported via the &quot;alternate port&quot; as follows:<br />
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Secure SMTP Port: 465<br />
Secure POP3 Port: 995<br />
Secure IMAP Port: 993<br />
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The other settings should be the same as the normal email settings.<br />
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You may receive the certificate name mismatch warning. It can be safely ignored.
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Secure SMTP and Secure POP3 is supported via the "alternate port" as follows:

Secure SMTP Port: 465
Secure POP3 Port: 995
Secure IMAP Port: 993

The other settings should be the same as the normal email settings.

You may receive the certificate name mismatch warning. It can be safely ignored.

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I have an exchange 2003 front end / back end setup. &nbsp;I can connect to exchange using pop3 through port 110 (the default) perfectly. &nbsp;When I switch to SSL and try to go through port 443 I cant connect. &nbsp;I have verified that port 443 is open. Is there any other settings that may stop this connection from happening?
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I have an exchange 2003 front end / back end setup.  I can connect to exchange using pop3 through port 110 (the default) perfectly.  When I switch to SSL and try to go through port 443 I cant connect.  I have verified that port 443 is open. Is there any other settings that may stop this connection from happening?

Connecting to exchange using pop3 and SSL

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

Email Protocols

HTTPS is a protocol for secure communication over a computer network which is widely used on the Internet. HTTPS consists of communication over Hypertext Transfer Protocol (HTTP) within a connection encrypted by Transport Layer Security (TLS) or its predecessor, Secure Sockets Layer (SSL). The main motivation for HTTPS is authentication of the visited website and to protect the privacy and integrity of the exchanged data. HTTPS is widely used for protecting page authenticity on all types of websites, securing accounts and keeping user communications, identity and web browsing private.

SSL / HTTPS

Exchange is the server side of a collaborative application product that is part of the Microsoft Server infrastructure. Exchange's major features include email, calendaring, contacts and tasks, support for mobile and web-based access to information, and support for data storage.