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Old 01-03-2009, 12:54 PM   #1
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postfix local users send mail restriction

It seems the local user could send email use other user's email address, anybody know to config to prevent this?

Thanks in advance
Old 01-04-2009, 08:32 AM   #2
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A quick Google brings up a very helpful looking page:

And another:

If this is an external mail server though , be careful - you might end up disallowing any one from the outside world from sending you Email.

If its an internal mail server then by all means implement authentication as well as IP based restrictions.

Old 01-04-2009, 07:49 PM   #3
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Is your concern that they can send mail to other users, or that they can set "from" to be some other user?
Old 01-04-2009, 11:04 PM   #4
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Thank you for your reply.

I'd like to stop some users from setting their 'from' email address. They could use their own account ids only.

One more question, how to control the number of emails that a user could send in one day and how to control the sending rate?

thank you again!


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