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  • Google Apps Registration

      The first thing you need to do to start using Google Apps is sign up for it. You can sign up for a Standard Google Apps account at this URL. There are also Premier and Education Google Apps editions...

  • Introduction to Google Apps.

      Google Apps is a set of web applications provided by Google. These web applications include Google Email, Google Calendar, Google Docs and Google Sites.       All of these web applications offer an ...

  • How do I use webmail?

    The best way to access webmail is to go to the webmail URL. It is just the domain name with webmail appended to the start....

  • Error 451: This mail account has sent too many messages in a short amount of time.

    SMTP Relay Account The following instructions are provided for customers who have an SMTP Relay Account. If you do not have an account and would like more information, please contact our Sales Departm...

  • Transport Layer Security (TLS)

    Overview The use of the Transport Layer Security (TLS) protocol over SMTP offers certificate-based authentication and helps provide security-enhanced data transfers by using symmetric encryption keys....

  • SMTP Command Reference

    Overview Simple Message Transfer Protocol (SMTP) is an asymmetric response protocol. This means that it transmits a command, and then waits for a response before transmitting the next command. The com...

  • SMTP Headers

    Overview An electronic mail message consists of two components, the message header, and the message body, which is the email's content. The message header contains control information, including, mini...

  • SMTP Response Codes (Reply Codes)

    Overview When any mail client or remote server attempts to send email to a mail server, the mail server will send a response to each command. The response indicates whether the command was processed c...

  • ISP Feedback Loops (FBL)

    What is a feedback loop? A feedback loop (FBL), sometimes called a complaint feedback loop, is an inter-organizational form of feedback by which an internet service provider (ISP) forwards the complai...

  • Sender Policy Framework (SPF)

    Overview The Sender Policy Framework (SPF) is an open standard specifying a technical method to prevent sender address forgery. More precisely, the current version of SPF — called SPFv1 or SPF Classic...