Re: obscure email address formats

On May 23, 2011, at 1:30 PM, ArkanoiD wrote:
> Is there any good reason to allow email addresses (in smtp, imap and alikes)
> in any format different from mailbox@fqdn ?
> 
> There is plenty of other stuff defined in RFCs and I wonder if anyone really uses it so
> I should *not* just filter it out.

People around these parts use address tags <[email protected]> all of the time to attempt delivery to a particular mailbox (if it exists) rather than INBOX.

RFC-5322 discusses obsolete addressing and header formats and suggests how they should be handled.  Nobody is likely to use explicit address routing nowadays, or UUCP !-paths, or headers with arbitrary amounts of whitespace between a header and the colon (ie, "Date     : " rather than "Date: ").

Regards,
-- 
-Chuck