+PH/01 Support for SQLite database lookups has been added. This is another
+ query-style lookup, but it is slightly different from the others because
+ a file name is required in addition to the SQL query. This is because an
+ SQLite database is a single file and there is no daemon as in other SQL
+ databases. The interface to Exim requires the name of the file, as an
+ absolute path, to be given at the start of the query. It is separated
+ from the query by white space. This means that the path name cannot
+ contain white space. Here is a lookup expansion example:
+
+ ${lookup sqlite {/some/thing/sqlitedb \
+ select name from aliases where id='ph10';}}
+
+ In a list, the syntax is similar. For example:
+
+ domainlist relay_domains = sqlite;/some/thing/sqlitedb \
+ select * from relays where ip='$sender_host_address';
+
+ The only character affected by the ${quote_sqlite: operator is a single
+ quote, which it doubles.
+
+ Note that you must set LOOKUP_SQLITE=yes in Local/Makefile in order to
+ obtain SQLite support, and you will also need to add -lsqlite3 to the
+ EXTRALIBS setting. And of course, you have to install SQLite on your
+ host first.
+
+PH/02 The variable $message_id is now deprecated, to be replaced by
+ $message_exim_id, which makes it clearer which ID is being referenced.
+
+PH/03 The use of forbid_filter_existstest now also locks out the use of the
+ ${stat: expansion item.
+
+PH/04 The IGNOREQUOTA extension to the LMTP protocol is now available in both
+ the lmtp transport and the smtp transport running in LMTP mode. In the
+ lmtp transport there is a new Boolean option called ignore_quota, and in
+ the smtp transport there is a new Boolean option called
+ lmtp_ignore_quota. If either of these options is set TRUE, the string
+ "IGNOREQUOTA" is added to RCPT commands when using the LMTP protocol,
+ provided that the server has advertised support for IGNOREQUOTA in its
+ response to the LHLO command.
+