Hi all, Iíve decided to recover an old machine of mine into a web server just out of curiosity. It is my first time looking into Linux. It was very hard to understand that arquitecture after a all live of windows but in the last two months Iíve discover so many new possibilities that I regret the fact of not trying it out sooner. So as silly as it may sound a lot of my doubts are simple things that I can not found the answer anywhere. Strait to the point: Iím using sendmail and the Return-path: email@example.com. As far as I know this does not look right. It should be something like firstname.lastname@example.org. The way it is happening it looks available for every spammer. Is my logic correct and if so how can a fix the issue?
Should have mention in my first post, but the message is from a online form in a user website (test user). I did had a look into -f option but it doesn't seem right since eventually users would not ad -f in their script when calling the sendmail. I thought it was permissions issue and uid, gid or sticky option at first but after a zillion try outs with diferent permissions i've put aside that option but i can be wrong, i'm really a newbbie in Linux systems.