Hi guys,

I have been trying to set my Postfix mail server working like this below.

I want all emails sent out from my server exactly arriving at a specific address like test@domain.com.
How can I make this happen by setting Postfix mail server?

Please help me, thank you.

GREEN

You need to create an alias for each of those addressees. Check the manpage for 'postalias'

man 1 postalias

Thanks for your post.

But what if I want to set all email addresses to arrive at the same address?

I don't want a@domain1.com or b@domain2.com or c@domain3.com or d@domain4.com to receive the email. I just want test@domain.com to receive the email.

It's more like changing the TO addresses to a specific one like test@domain.com.

Can I make this happen by using "postalias"?

Thank you.

Try looking at your postfix documentation related to aliases.

Simply stated, you can direct any incoming mail using aliases, so yes, your a@domain3.com will be redirected to user test@domain.com. You must set up something like this in the flat file "aliases" (this varies between installations...check your local.cf for the correct alias file):

------- snip ---------

a: test
b: test
c: test
d: test
...etc.

------- /snip ---------

As you will see in aliases.gz, you must run postmap to map the aliases into aliases.db before going live.

You must already be consolidating and receiving mail for each of the subdomains listed; domain2.com, domain3.com, etc. so that these users will receive mail at domain.com. But that's a separate issue.

I have a group of users for whom I want all their mail to come to a single "student@my.domain". I set it up exactly as shown.

Thank you very much for your post.
Probably I did not explain my situation very clearly.

For example, from my server I send 2 emails to
hello1@hotmail.com
hello2@gmail.com
And here I want all my emails that I have sent arriving at a specific email address like "hello3@yahoo.com".

hello1@hotmail.com -> hello3@yahoo.com
hello2@gmail.com -> hello3@yahoo.com
... -> hello3@yahoo.com
... -> hello3@yahoo.com
... -> hello3@yahoo.com

I want all emails from my server arriving at "hello3@yahoo.com"
There is nothing to do with user accounts in my server or my domain. My server does not need to receive emails, it only sends emails to other servers.

I know this is a really awkward question, but please help, I really need it.

Thank you.

Okay. So there's really nothing Postfix can do to help you. You can't really *ROUTE* email through different MTA's unless you control the transfer agents that you're hopping to.


Do you control "hello3@yahoo.com"? Are you sending unsolicited email to other users?

The reason why I am trying to do this is that in my company we have a web system to test, but every developer has written their own email addresses to test while they were developing the system.

I want to receive all emails for test in a specific address while testing, even there is a different email address in every program.

Probably we are totally wrong with the way writing programs or even testing.

I thought there was something that I could do before the emails have been sent, something like rewriting "TO email address" in Postfix. I have been searching on line for a while, but I did not find any suitable solution to this issue.

I do control hello3@yahoo.com, all emails I want arriving at another server in my company, which means all email from server A replacing to hello3@yahoo.com to arrive at server B in my company.

Sending 2 emails from sever A to
hello1@hotmail.com
hello2@gmail.com
Sever B receives those 2 emails that I have sent as test@serverB.com
I must do something in Server A before emails have been sent.

Anyway really thanks for your precious time.

Have you thought about adding cc: to each email? Send them to your hello1@hotmail.com user and cc: to test@serverB.com user as the second addressee?

Perhaps this isn't going to tell you what you need to know, but at least you would see all emails, gathered at a central email 'hub'.

I finally got what I needed by adding "canonical".

This was how I figured.

1.Add the line below to "main.cf"
recipient_canonical_maps = regexp:/etc/postfix/canonical

2.Set "canonical" (/etc/postfix/canonical)
# Replaces all recipients to hello3@serverB.com
/^(.*)$/ hello3@serverB.com

3.Update map
postmap /etc/postfix/canonical


The settings above help me rewriting all emails' addresses to "hello3@serverB.com" before sending.

Thank you very much for your advice and support.

Well played!