The native school keeps the Exim configuration in one file and external files are only used as data sources; this is strongly influenced by Philip Hazel's preferences and notes on performance as the configuration file is re-read at every exec, which happens post-fork for receiving inbound connections and at delivery.
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Philip Hazel retired from the University of Cambridge in 2007 and maintenance of Exim transitioned to a team of maintainers.
Starting in 1997, Philip Hazel developed PCRE (Perl Compatible Regular Expressions), which attempts to closely mimic Perl's regular expression functionality and is used by many modern tools including PHP and Apache HTTP Server.
Philip II of Spain | Philip K. Dick | John Philip Sousa | Philip II | Philip Roth | Philip IV of Spain | Philip II of Macedon | Philip | Philip Bradbourn | Philip Catherine | Prince Philip | Philip V of Spain | Hazel | Philip Pullman | Philip Sheridan | Philip Larkin | Philip IV of France | Philip the Good | Philip Sidney | Philip Marlowe | Philip IV | Philip III of Spain | Philip Hammond | Philip Webb | Philip Seymour Hoffman | Hazel (TV series) | Philip the Apostle | Philip Ruddock | Philip Massinger | Philip I of Castile |