As of two years ago, Ipswitch stated that 821 was the target, and if 2821 can't move past its present status, the passage of time will not in itself mandate anything different--though common usage may prevail over the standard.
This document says that IMail is RFC 2821 compliant: ftp://ftp.ipswitch.com/ipswitch/Product_Support/IMail/imail-tb.pdf
"SMTP RFCs supported: 2821, 2822, 1869, 1870, 1891, 1892, 1893, 1894, 1985 (ETRN), 2222 (PLAIN, LOGIN, CRAM-MD5)"
However, IMail is not SMTP RFC 2821 compliant because it does not include the Return-Path header, as it clearly requires.
RFC 2821 Simple Mail Transfer Protocol specification, section 4.4, Trace Information (http://www.ietf.org/rfc/rfc2821.txt):
"When the delivery SMTP server makes the "final delivery" of a message, it inserts a return-path line at the beginning of the mail data. This use of return-path is required; mail systems MUST support it. The return-path line preserves the information in the <reverse-path> from the MAIL command."
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James Thornton _____________________________________________ Internet Consultant, http://jamesthornton.com
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