Alona Rossen wrote:

> We observed duplication of user name when sending emails via SMTP
protocol with curl 7.21.0.

> AUTH PLAIN YWxvbmEXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX

> AUTH LOGIN XXXXXXXXXXXXXXXXXXXXXXXXX

You are comparing two different authentication mechanisms: PLAIN and
LOGIN

For an explanantion why userid is duplicated in the AUTH PLAIN
mechanism, see
http://tools.ietf.org/rfc/rfc4616.txt top of page 3, message =... and
the related comments.

As an illustration, see paragraphs "Example SMTP AUTH Session using AUTH
PLAIN" and "Example SMTP AUTH Session using AUTH LOGIN" on page at
http://www.gadgetwiz.com/protocols/smtp-auth-example.html.

Patrick

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Received on 2012-07-19