Email 101 White Paper Released
Roaring Penguin Software Inc. is pleased to announce the release of Email 101.
The concept of email is almost as old as the Internet. The first email programs were created for ARPANET in the late sixties / early seventies. email was created in simpler times when everyone on the network was trustworthy. Even knowing what we know today with regards to spammers we still tend to take email for granted and trust it far more than it deserves. This article takes a look at the components of the email system. After reading it you will understand how email moves on the Internet and how to interpret email message headers. The Simple Message Transfer Protocol (SMTP) and the Domain Name System (DNS) are covered in detail:
SMTP stands for Simple Mail Transfer Protocol and is the protocol used to deliver email on the Internet. SMTP is quite old; it was first standardized in 1982 in RFC 821. SMTP is the most prevalent protocol in email delivery. It provides no authentication and any aspect of an email message can be spoofed.
The Domain Name System (DNS) provides a distributed database for converting names to IP addresses. It uses caching to improve performance. There are different types of DNS records; two that control mail delivery are the Mail Exchange (MX) and Address (A) records. The MX record names hosts that will accept mail for a specific domain, and A records provide the IP addresses of named hosts.
| Anhang | Größe |
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| email-101_0.pdf | 212.6 KB |
| email101.jpg | 14.92 KB |
