SMTP Headers: How to parse

[Howard Kaikow]

I can get al the headers using the technique in
http://support.microsoft.com/default.aspx?scid=kb;en-us;194870, but how can
I then separate out the individual headers? SPLIT using vbcrlf is not
adequate as a header could take more than one line.

Is there a way to reference each SMTP header?

 

[Dan Mitchell]

I can get al the headers using the technique in
http://support.microsoft.com/default.aspx?scid=kb;en-us;194870, but
how can I then separate out the individual headers? SPLIT using vbcrlf
is not adequate as a header could take more than one line.

See ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt, section 2.2.3;

"The process of moving from this folded multiple-line representation
of a header field to its single line representation is called
"unfolding". Unfolding is accomplished by simply removing any CRLF
that is immediately followed by [whitespace]"

-- dan

 

[Howard Kaikow]

I can get al the headers using the technique in
http://support.microsoft.com/default.aspx?scid=kb;en-us;194870, but
how can I then separate out the individual headers? SPLIT using vbcrlf
is not adequate as a header could take more than one line.

See ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt, section 2.2.3;

"The process of moving from this folded multiple-line representation
of a header field to its single line representation is called
"unfolding". Unfolding is accomplished by simply removing any CRLF
that is immediately followed by [whitespace]"

Thanx.

 

[Howard Kaikow]

I can get al the headers using the technique in
http://support.microsoft.com/default.aspx?scid=kb;en-us;194870, but
how can I then separate out the individual headers? SPLIT using vbcrlf
is not adequate as a header could take more than one line.

See ftp://ftp.rfc-editor.org/in-notes/rfc2822.txt, section 2.2.3;

"The process of moving from this folded multiple-line representation
of a header field to its single line representation is called
"unfolding". Unfolding is accomplished by simply removing any CRLF
that is immediately followed by [whitespace]"

An earlier version of RFC 822 includes the definition of whitespace.
For RFC 2822, it appears necessary to check RFC 2234.

Seems the relevant charaxters are space and horizontal tab.