Re: [Exim] ACL : need help on a relay

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Author: Tony OGER
Date:  
To: exim-users
Subject: Re: [Exim] ACL : need help on a relay
Tanks Andréas for your help.


> Lets assume there is exec@??? and secretary@???. Now
> exec@??? goes to a business conference in Las Vegas and sends a
> summary to secretary@???. Do you want to reject this mail?
>

No one could use our SMTP relay directly from internet to send from @foo.com
to @foo.com . The only way to send mail is to use a webmail, or a VPN
connection to our network.

> Or if there is bob@??? that only recently was employed at
> foo.com and got his bob@??? address. Now he forwards all mail from
> bob@??? to bob@???. exec@??? sends mail to
> bob@???. - Do you want to reject this mail?
>

This is a good case indeed :).. havn't thought about such redirecting issue.

>
> in the rcpt acl:
> deny domains=foo.com
>      sender_domains=foo.com
>      hosts = !+relay_from_hosts

>
> Straightforward. Where is the problem?
>                cu andreas

>

Problem was that anybody could connect to our smtp mail server from internet
and send a fake mail with a fake email_address or our company, to another
person in this company. How could i trust it, if it s a fake or not. ?
Thought i could control this on the relay servers.

> --
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