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Microsoft Exchange Server is a mail server and calendaring server developed by Microsoft. It runs exclusively on Windows Server operating systems. The first version was called Exchange Server 4.0, to position it as the successor to the related Microsoft Mail 3.5. Exchange initially used the X.400 directory service but switched to Active ...
This is usually due to problems on the mail server, heavy internet traffic, or routing problems. Unfortunately, other than waiting, you won't be able to determine if the message is delayed or undeliverable.
An email address consists of two parts, a local-part (sometimes a user name, but not always) and a domain; if the domain is a domain name rather than an IP address then the SMTP client uses the domain name to look up the mail exchange IP address.
A virtual private server (VPS) is a virtual machine sold as a service by an Internet hosting service.The term "virtual dedicated server" (VDS) has a similar meaning.A virtual private server runs its own copy of an operating system (OS), and customers may have superuser-level access to that operating system instance, so they can install almost any software that runs on that OS.
In computing, the Post Office Protocol (POP) is an application-layer Internet standard protocol used by e-mail clients to retrieve e-mail from a mail server. [1] Today, POP version 3 (POP3) is the most commonly used version. Together with IMAP, it is one of the most common protocols for email retrieval.
MDaemon Email Server is an email server application with groupware functions for Microsoft Windows, [1] [2] first released by Alt-N Technologies in 1996. [3] [4] Features
IceWarp Mail Server is a business Email and Collaboration server developed by IceWarp Ltd. It features email with custom domain, shared calendars, documents editing, messaging and advanced tool for team collaboration and can be run in Cloud or on a local server using either Windows or Linux, [1] [2] or together with another solution in Hybrid deployment.
Mercury Mail Transport System (Mercury MTS) is a standards-compliant mail server developed by David Harris, who also develops the Pegasus Mail client. It was freeware prior to January 2007, but is now donationware for non-commercial and personal use, and shareware for other uses.