Linux - SecurityThis forum is for all security related questions.
Questions, tips, system compromises, firewalls, etc. are all included here.
Notices
Welcome to LinuxQuestions.org, a friendly and active Linux Community.
You are currently viewing LQ as a guest. By joining our community you will have the ability to post topics, receive our newsletter, use the advanced search, subscribe to threads and access many other special features. Registration is quick, simple and absolutely free. Join our community today!
Note that registered members see fewer ads, and ContentLink is completely disabled once you log in.
If you have any problems with the registration process or your account login, please contact us. If you need to reset your password, click here.
Having a problem logging in? Please visit this page to clear all LQ-related cookies.
Get a virtual cloud desktop with the Linux distro that you want in less than five minutes with Shells! With over 10 pre-installed distros to choose from, the worry-free installation life is here! Whether you are a digital nomad or just looking for flexibility, Shells can put your Linux machine on the device that you want to use.
Exclusive for LQ members, get up to 45% off per month. Click here for more info.
I have recently been having problems with spammers relaying thru my mail server, I have followed all the security precautions to prevent relaying but somehow it is still happening, typically the emails
are addressed to a fictional name in my domain eg. prisint9862@mydomain.com from an address like investmentalert@mydomain.com. The emails are typically ccd to hundreds of aol.com emails which has not made me popular with that particular domain. Can anyone recommend how to stop this relaying? In my access file I have:
I have recently been having problems with spammers relaying thru my mail server, I have followed all the security precautions to prevent relaying but somehow it is still happening, typically the emails
are addressed to a fictional name in my domain eg. prisint9862@mydomain.com from an address like investmentalert@mydomain.com. The emails are typically ccd to hundreds of aol.com emails which has not made me popular with that particular domain. Can anyone recommend how to stop this relaying? In my access file I have:
Look in your maillog (/var/log/maillog) and see what sendmail is doing.
Best thing to do is add authentication on your mail server. All the information is on sendmail.org. Look for SMTP AUTH. Any user who has an account on the server will need to authenticate for sending any emails.
LinuxQuestions.org is looking for people interested in writing
Editorials, Articles, Reviews, and more. If you'd like to contribute
content, let us know.