|BoxMatrix >> Lexicon >> Network-Protocols >> SMTP||@|
|Short for:||Simple Mail Transfer Protocol|
|Location:||Lexicon >> Network-Protocols|
|Weblinks:||- - -|
|Description:||Protocol for sending Email|
Before SMTP electronic mail was sent using the FTP protocol and FTP mail servers (!!!).
SMTP had quite some evolution. Initially the message body only permitted ASCII according to the IMF standard.
This changed when MIME was introduced, permitting arbitary Charsets, multipart messages and attachments.
Early SMTP did not provide any authentification. Access to the server could only be controlled by limiting the client IP range.
This changed when SMTP-AUTH was introduced (see RFC-4954), which requires a user account to login and send Email.
Initially SMTP only supported clear text communication to the server. This changed when SMTPS was introduced.
It is implemented in kdsldmod.ko, which is the routing core.
$N is the connection number, starting with 0.
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