added ereject rfc5429

Author: manfred-kaiser

setup.py

@@ -61,6 +61,7 @@
             'notify = sifter.commands.notify:CommandNotify',
             'redirect = sifter.commands.redirect:CommandRedirect',
             'reject = sifter.commands.reject:CommandReject',
+            'ereject = sifter.commands.reject:CommandEReject',
             'require = sifter.commands.require:CommandRequire',
             'set = sifter.commands.variables:CommandSet',
             'stop = sifter.commands.stop:CommandStop',

sifter/commands/reject.py

@@ -21,3 +21,8 @@ def evaluate(self, message: Message, state: EvaluationState) -> Optional[Actions
         state.actions.append('reject', reject_message)
         state.actions.cancel_implicit_keep()
         return None
+
+
+class CommandEReject(CommandReject):
+
+    RULE_IDENTIFIER: Text = 'EREJECT'

sifter/extensions/__init__.py

@@ -42,6 +42,7 @@ class ExtensionRegistry():
         'imap4flags',
         'regex',
         'reject',
+        'ereject',
         'variables',
     ]
 

tests/evaluation_7.rules

@@ -2,12 +2,13 @@ require "reject";
 
 #testcomment1
 
-if header "from" "coyote@desert.example.org" # testcomment2
-  {
-    reject text: # testcomment3
+if not header "from" "coyote@desert.example.org"  { # testcomment2
+   keep;
+} else {
+    ereject text: # testcomment3
 I do not accept messages from/* this is
 not a comment */this address.
 ..
 .
 ;
-  }
+  }