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If you see an image challenge question when sending mail, you should just be able to complete the challenge then send mail. If, however, you correctly answer the image challenge and still can't send mail, it could be a sign of a more serious issue with your account, which may require additional steps to secure your account.
If your third-party email app is having issues connecting, sending, or receiving emails, you may need to reconfigure your account or update the app. Use these steps to identify and fix the source of the problem.
A LAN messenger operates in a similar way over a local area network. Short messages are typically transmitted between two parties when each user chooses to complete a thought and select "send". Some IM applications can use push technology to provide real-time text, which transmits messages character by character, as they are composed.
For some features: secret chats, [116] voice and video calls, [117] and voice chats in groups [117] No No No Tencent QQ: No [118] [119] No No No No Threema: No A valid phone number or email address is not required for registration & login. However, the mobile app serves as the primary device, due to the end-to-end encryption architecture. [120 ...
Yahoo! Messenger added video capabilities in 2001; [32] by 2005, such features were built-in also in AIM, MSN Messenger, and Skype. [33] There were a reported 100 million users of instant messaging in 2001. [34] As of 2003, AIM was the globally most popular instant messenger with 195 million users and exchanges of 1.6 billion messages daily. [2]
Messenger) Zephyr Notification Service: MIT: 1987 Open standard: Kerberos principal e.g. user@ATHENA.MIT.EDU Yes No No Yes Yes Yes No Yes No No No No No ? Zephyr Notification Service; Protocol Creator First public release date License Identity (not inc. alias) Asynchronous message relaying Transport Layer Security End-to-end encryption
MSN Messenger (also known colloquially simply as MSN [2] [3]), later rebranded as Windows Live Messenger, was a cross-platform instant-messaging client developed by Microsoft. [4] It connected to the now-discontinued Microsoft Messenger service and, in later versions, was compatible with Yahoo!
Threema is a paid cross-platform encrypted instant messaging app developed by Threema GmbH in Switzerland and launched in 2012. The service operates on a decentralized architecture and offers end-to-end encryption. Users can make voice and video calls, send photos, files, and voice notes, share locations, and make groups.