Post Office Protocol version 3 (POP3) is a standard mail protocol used to receive emails from a remote server to a local email client. POP3 allows you to download email messages on your local computer and read them even when you are offline.
The Internet Message Access Protocol (IMAP) is a mail protocol used for accessing email on a remote web server from a local client. IMAP and POP3 are the two most commonly used Internet mail protocols for retrieving emails. Both protocols are supported by all modern email clients and web servers.
The POP3 protocol assumes that there is only one client connected to the mailbox. In contrast, the IMAP protocol allows simultaneous access by multiple clients. IMAP is suitable for you if your mailbox is about to be managed by multiple users.
Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending emails across the Internet. SMTP uses TCP port 25 or 2525 and sometimes you can have problems sending your messages in case your ISP has closed port 25 (How to check if port 25 is open?). To determine the SMTP server for a given domain name, the MX (Mail eXchange) DNS record is used.
Yes, we do! MAPI (Messaging Application Programming Interface) was designed for Microsoft Exchange server and has been used by Microsoft Outlook ever since the first version: Outlook 97. To use all the features of Outlook 97-Outlook XP users need to use MAPI, but this requires a local network or VPN (Virtual Private Network) connection to server. We provides VPN connection as an option. For users of Outlook 2003 and Outlook 2007 we have an alternative way to use all of the features of the latest versions of this program HTTPS RPC.
Exchange Server 2003 enables users to use the Windows RPC over HTTP Proxy component to access their Exchange information from the Internet. This technology wraps remote procedure calls (RPCs) with an HTTP layer. This allows the traffic to traverse network firewalls without requiring RPC ports to be opened.