Blackberry email stopped updating


17-Oct-2019 15:17

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The news comes after Whats App rolled-out the ability to delete sent messages.

Whats App users will be able to delete messages that they have either sent to a group or an individual chat.

Outgoing mail is generally pushed from the sender to the final mail delivery agent (and possibly via intermediate mail servers) using Simple Mail Transfer Protocol.

If the receiver uses a polling email delivery protocol, the final step from the last mail delivery agent to the client is done using a poll.

Push email is an email system that provides an always-on capability, in which new email is actively transferred (pushed) as it arrives by the mail delivery agent (MDA) (commonly called mail server) to the mail user agent (MUA), also called the email client.

Email clients include smartphones and, less strictly, IMAP personal computer mail applications.

The Internet Message Access Protocol (IMAP) provides support for polling and notifications.

When a client receives a notification from a server, the client may choose to fetch the new data from the server.

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At login and later at intervals, the mail user agent (client) polls the mail delivery agent (server) to see if there is new mail, and if so downloads it to a mailbox on the user's computer.This makes retrieval of new messages more flexible than a purely push system, because the client can choose whether to download new message data.Although push email had existed in wired-based systems for many years, one of the first uses of the system with a portable, "always on" wireless device outside Asia was the Black Berry service from Research In Motion.For example, a user with a laptop on a Wi-Fi connection may be assigned different addresses from the network DHCP server periodically and have no persistent network name.

When new mail arrives to the mail server, it does not know what address the client is currently assigned.Until early 2013, they supported Gmail push email (via Google Sync) and Microsoft's Exchange Active Sync platform, allowing them to synchronize email, calendars and contacts with mail servers such as Microsoft Exchange Server, Kopano, Zimbra, and Kerio Connect.



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