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Simple Mail Transfer Protocol
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==See also== *[[Bounce address]] *[[CRAM-MD5]] (a SASL mechanism for ESMTPA) {{IETF RFC|2195}} *[[Email]] **[[Email encryption]] *[[DKIM]] *[[Ident protocol|Ident]] *[[List of mail server software]] *[[List of SMTP server return codes]] *[[POP before SMTP|POP before SMTP / SMTP after POP]] *[[Internet Message Access Protocol]] Binary Content Extension {{IETF RFC|3516}} *[[Sender Policy Framework]] (SPF) *[[Simple Authentication and Security Layer]] (SASL) {{IETF RFC|4422}} *[[SMTP Authentication]] *[[Variable envelope return path]] *[[Comparison of email clients]] for information about SMTP support
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