Email Relaying? Please help...

M

Milano

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I have a Unix virtual server with a catchall email address. Since yesterday, I have been receiving about 70 -80 mail delivery failures a minute from <variousemailaddresses>@mydomain.co.za . Seems spammers are sending from [email protected].

1. Not very familiar with this. Is this called email relaying? What is allowing them to send spam with my domain name?

2. How do I stop them being able to do this?

Any help appreciated...
 
Just deleted 250 more mail delivery failure emails. Can't delete fast enough. Any ideas?
 
close that open relay of yours.

Sounds like you have an open relay and spammers love open relays on mail servers...
 
milano said:
I have a Unix virtual server with a catchall email address. Since yesterday, I have been receiving about 70 -80 mail delivery failures a minute from <variousemailaddresses>@mydomain.co.za . Seems spammers are sending from [email protected].

1. Not very familiar with this. Is this called email relaying? What is allowing them to send spam with my domain name?

2. How do I stop them being able to do this?

Any help appreciated...
Click to expand...
Basically you cant - disable your catchall for a while. If your host allows you to set up a SPF it might help. http://en.wikipedia.org/wiki/Sender_Policy_Framework

BTW - if your server requires authentication then I doubt its a relaying issue.
 
Last edited:
Setup a rule that deletes them automatically. They're sending emails as you to addresses that don't exist and you're getting the bounces. I had this with the last job I was at to the tune of around 400 000 email bounces a day.
 
Ok thanks. I have set up a rule to move them to another folder. Some are legit so I can sort through them later. This should work until I have a more permanent solution :)
 
Nah - just lazy - copied the wrong search result from a google search :o
 
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