Allow equal sign in local part of email address

patterns/postfix

@@ -1,7 +1,8 @@
 # maillog stuff:
 QUEUEID (?:[A-F0-9]+|NOQUEUE)
-ADDRESSPART [a-zA-Z0-9_.+-]+
-ADDRESS <%{ADDRESSPART:local}@%{ADDRESSPART:remote}>
+# TODO fix this to avoid future issues
+ADDRESSPART [a-zA-Z0-9_.+=-]+
+ADDRESS <%{ADDRESSPART:local}@%{IPORHOST:remote}>
 RELAY (?:%{HOSTNAME}(?:\[%{IP:ip}\]:%{POSREAL:port:int})|none|%{WORD})
 POSREAL [0-9]+(.[0-9]+)?
 DELAYS %{POSREAL:a:float}/%{POSREAL:b:float}/%{POSREAL:c:float}/%{POSREAL:d:float}

spec/postfix_spec.rb

@@ -15,9 +15,13 @@
 
   describe "%{ADDRESS}" do
 
+    it_should_behave_like "a grok pattern matcher",
+                          "%{ADDRESSPART}",
+                          %w(bounce+user==a==cxxx.com==dxxxx)
+
     it_should_behave_like "a grok pattern matcher",
                           description,
-                          %w(<user@example.com>),
+                          %w(<user@example.com> <bounce+user==a==cxxx.com==dxxxx@lists.xxxx.org>),
                           %w(not_valid_address)
 
     it_should_behave_like "a grok field matcher",