At 13:38 10-03-2009, Anthony Piccione wrote:
My SMTP logs are telling me that my e-mail is being rejected by
certain domains (not all) because there are bare line feeds (LF) in
the outbound e-mail. My e-mail is created by a .NET 1.1 application.
This question is about SMTP and not DKIM. From RFC 5321:
"The custom of accepting lines ending only in <LF>, as a concession to
non-conforming behavior on the part of some UNIX systems, has proven
to cause more interoperability problems than it solves, and SMTP
server systems MUST NOT do this, even in the name of improved
robustness. In particular, the sequence "<LF>.<LF>" (bare line
feeds, without carriage returns) MUST NOT be treated as equivalent to
<CRLF>.<CRLF> as the end of mail data indication."
You can configure the server used for mail submission to fix these
bare line feeds if it has such a feature or else fix your application
so that it sends RFC 5322 compliant messages.
Regards,
-sm
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