How to find IP address of sender from incoming email in Outlook?
Apr 3, 12 This is supposed to force all email to look up the MX for a domain, who will find the filtering solution, to deliver email to. The filtering solution will then deliver the filtered email to my server. The only flaw in this is that some SPAMMERs will will do a port scan or just assume that that the A record for the domain will also accept email form anyone.
To stop this I want to have Exim only accept email for delivery from users that have authenticated via POP or the My server requeires authentication or a set range of IP's for the filtering solution. Does any one have suggestions on how to do this? Allow users on the server to continue to use port 25 for their outgoing server but limit inbound connections for email deiivery to a range of IP addresses? Currently my work around makes the assumption that all legitimate email will be coming from the filtering solution thus I have set Spam assassin to delete email with a spam scrore of 6 or more.
The idea is that local users will not spam each other and only spammer will be direct connecting to the server.
Even though this achieves one goal, I want to turn off SA when all users have been place on the new system. Sincerely, Mike. Hi, I found the a solution. Add this: 0. Add this: xxx.
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That is it. Users will still be able to authenticate on port 25 to send email from your server while restricting all incoming email to be from a set IP or range of IP's. Show hidden low quality content.
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Limit incoming email accpected from IP range only | cPanel Forums
Block IPs from sending you email
IP address. Enter the IP address that you wish to associate with a domain name.
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You must enter this address in dotted decimal form. Click the A dd button to add the domain and IP address range to the listing. Click this button to remove the selected entries from the listing.
Do not apply IP Shield to messages sent to valid local users. This will prevent others from posing as one of your local users in order to relay their mail through your server, but it will save resources by not checking messages that are addressed to your users. If you enable both this option and the IP Shield honors aliases option below, messages to valid aliases will be accepted as well. Do not apply IP Shield to authenticated sessions. When this control is active, the IP Shield restrictions will not apply to authenticated users.
Mail will be accepted from an authenticated user regardless of the IP address from which he or she connects. Further, when a user doesn't authenticate and access is refused, the message returned to the SMTP client will be "Authentication required" in order to give the user a clue that he can fix the problem by configuring the mail client to use authentication before sending a message.