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+
+# Questions #
+-------------
+
+1. What is the lowest available RAM for a target server running a leap_mx?
+       1.a. Do we want to store all id_keys and/or aliases in memory?
+
+2. Asked in discussion section of '''postfix pipeline''' on the [leap_mx wiki
+page](https://we.riseup.net/leap/mx) : 
+
+   "What is the best way to have postfix write a message to a spool directory?
+    There is a built-in facility for saving to a maildir, so we could just
+    specify a common maildir for everyone. alternately, we could pipe to a
+    simple command that was responsible for safely saving the file to disk. a
+    third possibility would be to have a local long running daemon that spoke
+    lmtp that postfix forward the message on to for delivery."
+
+    I think that maildir is fine, but perhaps this will slow things down more
+    than monitoring a spool file. I would also imagine that if the server is
+    supposed to stand up to high loads, a spool file I/O blocks with every
+    email added to the queue.
+
+3. How do get it to go faster? Should we create some mockups and benchmark
+them? Could we attempt to learn which aliases are most often resolved and
+prioritize keeping those in in-memory mappings?
+
+4. What lib should we use for Python + Twisted + GPG/PGP ?
+
+
+## Tickets ##
+-------------
+
+'''To be created:'''
+
+ticket for feature-alias_resolver_couchdb_support:
+
+    o The alias resolver needs to speak to a couchdb/bigcouch
+    instance(s). Currently, it merely creates an in-memory dictionary
+    mapping. It seems like paisley is the best library for this.
+
+ticket for feature-check_recipient: 
+
+    o Need various errors for anything that could go wrong, e.g. the recipient
+      address is malformed, sender doesn't have permissions to send to such
+      address, etc.
+    o These errcodes need to follow the SMTP server transport code spec.
+
+ticket for feature-virtual_alias_map: 
+
+    o Get the recipient's userid from couchdb.