diff --git a/offlineimap.conf b/offlineimap.conf
index cf5a69d..b8a6185 100644
--- a/offlineimap.conf
+++ b/offlineimap.conf
@@ -292,6 +292,7 @@ type = IMAP
 # "getcredentials" that parses a file "filename" and returns the account
 # details for "hostname".
 # remotehosteval = getcredentials("filename", "hostname", "hostname")
+# remoteporteval = getcredentials("filename", "hostname", "port")
 # remoteusereval = getcredentials("filename", "hostname", "user")
 # remotepasseval = getcredentials("filename", "hostname", "passwd")
 
diff --git a/offlineimap/repository/IMAP.py b/offlineimap/repository/IMAP.py
index be8c858..f18090f 100644
--- a/offlineimap/repository/IMAP.py
+++ b/offlineimap/repository/IMAP.py
@@ -148,6 +148,13 @@ class IMAPRepository(BaseRepository):
 
 
     def getport(self):
+        port = None
+
+        if self.config.has_option(self.getsection(), 'remoteporteval'):
+            port = self.getconf('remoteporteval')
+        if port != None:
+            return self.localeval.eval(port)
+
         return self.getconfint('remoteport', None)
 
     def getssl(self):