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How can i setup MTA to MTA smtp authentication. Scenario: I've an email server which is acting as both incoming/outgoing server with smtp authentication. I want to setup a separate smtp server which would authenticate users for other server.

I want to set up a SECOND smtp server that will be used by users of the first one. Second smtp will use users authentication from first smtp. All the domains/users mailboxes are exists on first smtp.

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I hope you'll forgive my saying this, but if you're hoping for any answers to this question, I'd strongly advise you to review some of the other 17 questions you've asked in the past year, and accept some of the answers. You do this by clicking on the "tick" outline under the most satisfactory answer, and it drives the SF reputation system. Until you do, we see a big "0% accept rate" warning by your username, and this doesn't encourage people to spend time answering your next question. – MadHatter May 4 '11 at 14:18
cough cough. You have 18 questions and have accepted answers on none of them. Go back and accept some answers and you'll find that more people are willing to spend time on answers. – EEAA May 4 '11 at 14:19
I'm sorry, I did not knew that how to accept answer. – User4283 May 4 '11 at 16:24

In the hope that this user learned how to accept answers :) while I do not understand the question, pieces of it I might. If you want to configure an SMTP server to authenticate upstream, is an easy way. If you want several postfix servers to auth the same users, is what I would do.

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