Open DNS/Spam question

This is something I've been pondering, what is to stop spammers using free/open dns rather than trying to compromise email addresses to use as a relay?
Silas2Asked:
Who is Participating?
I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

the_endjinnCommented:
Hi Silas,

Please add a bit more detail to your question, what part of SMTP email are you suggesting is compromised by open DNS servers?

Thanks.
0
Silas2Author Commented:
I thought that spammers might just use an opendns address to send from (i.e. a mailserver using that address) rather than keeping on trying to crack our email addresses to use as relays.
0
the_endjinnCommented:
There is nothing in the SMTP protocol to stop you from using any email address you like. I could send email from your email address if I knew what it was.

Additions like SPF, if implemented on the receiving server, can help verify that the email was sent by the domain owners however it's not faultless.

Spammers tend to use a variety of techniques, if they can compromise relays then it makes things easier but they could also just use a bunch of other compromised machines to run any service they wanted.
0

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
Silas2Author Commented:
Yes, I suppose, i just thought those free/open dns servers would be a spammers gift, I can't work out why they bother with all that email-account-cracking stuff.

But even with SPF, open/free dns you can put a domain on top with almost no hassle.
0
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today
Email Protocols

From novice to tech pro — start learning today.