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  2. Callback verification - Wikipedia

    en.wikipedia.org/wiki/Callback_verification

    Callback verification, also known as callout verification or Sender Address Verification, is a technique used by SMTP software in order to validate e-mail addresses. The most common target of verification is the sender address from the message envelope (the address specified during the SMTP dialogue as " MAIL FROM ").

  3. Wikipedia : IRC/Channel access and configuration guide

    en.wikipedia.org/wiki/Wikipedia:IRC/Channel...

    A list of commands is at /msg SERVICE_NAME Help. As well as the settings held permanently in services, users and channels have settings that are only held so long as the channel is occupied, and are lost if the channel fully empties. These include most notably, its "invite" list, and any "modes" or "topic" not set up as a default setting in ...

  4. List of IRC commands - Wikipedia

    en.wikipedia.org/wiki/List_of_IRC_commands

    This is a list of all Internet Relay Chat commands from RFC 1459, RFC 2812, and extensions added to major IRC daemons. Most IRC clients require commands to be preceded by a slash (" / "). Some commands are actually sent to IRC bots ; these are treated by the IRC protocol as ordinary messages, not as / -commands.

  5. Add or disable 2-step verification for extra security - AOL Help

    help.aol.com/articles/2-step-verification...

    2. Next to "2-Step Verification," click Turn on 2SV. 3. Click Get started. 4. Select Authenticator app for your 2-step verification method.-To see this option, you'll need to have at least 2 recovery methods on your account . 5. Click Continue. 6. Scan the QR code using your authenticator app. 7. Click Continue. 8. Enter the code shown in your ...

  6. Message authentication code - Wikipedia

    en.wikipedia.org/wiki/Message_authentication_code

    However, non-repudiation can be provided by systems that securely bind key usage information to the MAC key; the same key is in the possession of two people, but one has a copy of the key that can be used for MAC generation while the other has a copy of the key in a hardware security module that only permits MAC verification. This is commonly ...

  7. Why am I asked to verify my account after signing in?

    help.aol.com/articles/why-am-i-asked-to-verify...

    You may be prompted to get a verification code at your recovery phone number or recovery email address for any of the following reasons:

  8. SMTP Authentication - Wikipedia

    en.wikipedia.org/wiki/SMTP_Authentication

    C: EHLO client.example.com S: 250-smtp.example.com Hello client.example.com S: 250 AUTH GSSAPI DIGEST-MD5 PLAIN C: AUTH PLAIN aWxvdmV3aWtpcGVkaWE= S: 235 2.7.0 Authentication successful SMTP AUTH can be used also on port 25. Usually, servers reject RCPT TO commands that imply relaying unless authentication credentials have been accepted.

  9. Instruction list - Wikipedia

    en.wikipedia.org/wiki/Instruction_list

    Many vendors whilst incorporating the full IEC 61131-3 requirements have additional vendor specific calls/function blocks to suit their hardware such as reading or writing to I/O. Siemens PLC instruction list language is known as "Statement List" or "STL" in English, and "Anweisungs-Liste" or "AWL" in German, Italian and Spanish.