Q0019

Nigel Metheringham edited this page Nov 29, 2012 · 2 revisions
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Q0019

Question

There seems to be a problem in the string expansion code: it doesn't recognize references to headers such as ${h_to}.

Answer

The only valid syntax for header references is (for example) $h_to: because header names are permitted by RFC 2822 to contain a very wide range of characters. A colon (or white space) is required as the terminator.