Even more specific: mailto's are specified in RFC 6068 with some definitions coming from RFC 5322. Those specify the exact rules, a little complicated to summarize here, but for example the @ between the local-part and domain in the addresses shouldn't be escaped. The URI module claims to support the now obsolute mailto specification from RFC 2368.

In reply to Re^3: Post Email address as CGI Parameter by Anonymous Monk
in thread Post Email address as CGI Parameter by doubledecker

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