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Message authentication code. In cryptography, a message authentication code ( MAC ), sometimes known as an authentication tag, is a short piece of information used for authenticating and integrity -checking a message. In other words, to confirm that the message came from the stated sender (its authenticity) and has not been changed (its integrity).
The ability to recall or unsend an email is not available in AOL Mail, because we provide a web-based service which sends messages instantly and once you send an email message, it's gone from your email server and out of our control. If you're unsure about sending an email, save the message to think things over, then send it later.
Hook flash. On analog telephone lines with special services, a flash or register-recall signal is used to control functions on the public telephone exchange, PBX or VoIP ATA . The term "register-recall" in Europe refers to sending a discrete signal to alert the "register" — the logical system controlling a telephone exchange, that it should ...
Exchange Online Protection (EOP, formerly Forefront Online Protection for Exchange or FOPE) is a hosted e-mail security service, owned by Microsoft, that filters spam and removes computer viruses from e-mail messages.
AOL Mail lists your emails together in a single thread, making it easier to follow the flow of the conversation. This feature can help you to quickly locate specific emails and reduce clutter in your inbox. Use the collapse icon or expand icon to view the messages in the conversation thread. Turn conversations on or off
1-5-7-1. 1-5-7-1 is the name of a family of calling features in the United Kingdom, for residential and business telephone lines and for mobile telephones, that are provided by BT Group and several other telephone service providers. The family is named after the telephone number 1571, the special service number that is used to access it.
Call waiting is a telephone service where a subscriber can accept a second incoming telephone call by placing an in-progress call on hold —and may also switch between calls. With some providers it can be combined with additional features such as conferencing, call forwarding, and caller ID. Call waiting is intended to alleviate the need to ...
The migration process from Exchange Server 5.5 necessitated having the two systems online at the same time, with user-to-mailbox mapping and a temporary translation process between the two directories. Exchange 2000 Server also added support for instant messaging, but that capability was later spun off to Microsoft Office Live Communications ...