TLD comparison rewrites

TLD comparison rewrites, and
New in 7.0.5, the  and   control sequences allow  checking domain top level portions against the  current1  TLD (Top Level Domain) list. They act like    and ,  respectively,  except that instead of checking for a domain known to the directory, they check the top-level part of the current domain against the list of known valid TLDs. succeeds if the top-level part is on the list;  succeeds if the top-level part isn&#x27;t on the list.

 1To keep the  file on your host up-to-date, it is recommended that you regularly fetch a new version. See, for instance,. After fetching a new  file, issue the command   to have the MTA rebuild its list.

As of MS 8.0.2.2, U-labels (see RFC 5890 section 2.3.2.1) are converted to A-labels before looking them up in tlds.txt. Note that the opposite is not true and specification of U-label domains in tlds.txt will not work.

See also:
 * chbuild utility
 * Rewrite rule template substitutions and control sequences