Is the SMTP safe?
I just found out I can connect to my SMTP Server via pythons smtplib without the need to login and send mails to whatever address with a random 'from'-address.
I did some relay tests online and they all say it's relay safe.. but... is it a correct behaviour?
As an example:
Yes, thats the correct behaviour.
There are 3 possibilitys where every mailserver ahs to accept emails:
1) The email is from localhost
2) The email is sent from a server that we allow to relay. See mynetworks setting in main.cf
3) The recipient domain is a local domain of this server.
thanks for your answer.
I did the test above from my machine at work.
None of the 3 points you mentioned match this machine - I think.
So is this realy correct?
Use this test to find out if your machine relays:
Leave the email field empty or use a external address like gmail.
If you followed the perfect setup guide to install your server, then it is no open relay.
Okay, seems to be safe.. :)
Though I don't understand why I can do what I described above..
Thanks a lot,
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