Synonym is a product that allows a company
to easily archive all email messages going in and out. It
can copy mail messages, delete, reject or add a text and/or
html signature based on a XML based configuration file
listing regular expression rules.
Please note: Synonym is no longer being actively developed.
While it gets the job done, you may want to check out the
site for a
actively developed alternative.
Why archive messages?
An archive containing all the
messages that passed through a company's MTA ensures no
messages are lost. Even when using public folders with
read-only access, some messages might not contain the
public folder address in the recipients list so when a user
deletes a message that email might be lost forever. A
searchable archive of all the talks between a company and
the client is a very useful tool allowing incident tracking
for people that were not directly involved in the email
How can I tell if my messages are being copied using
Synonym adds a header named "X-Synonym" to all
messages being copied. It includes the address to which the
emails were copied. If the email is missing this header, it
was not copied by Synonym.
Doesn't copying messages constitute an invasion of
Synonym starts out as a tool that helps people
follow projects. If you are concerned about the privacy of
your email conversations, you should use GNU PGP to encrypt
your messages. If someone wants to read your email and they
have the required access level, they can open your mailbox
without using Synonym. Please note that Modulo Consulting
is in no way responsible for the usage of the product. See
Synonym's license for more details.
How does Synonym work?
Synonym is based on the
Sendmail Milter extension. For an excellent description on
Milter and other products using it, see Stéphane Lentz's