Linux - NewbieThis Linux forum is for members that are new to Linux.
Just starting out and have a question?
If it is not in the man pages or the how-to's this is the place!
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.
Introduction to Linux - A Hands on Guide
This guide was created as an overview of the Linux Operating System, geared toward new users as an exploration tour and getting started guide, with exercises at the end of each chapter.
For more advanced trainees it can be a desktop reference, and a collection of the base knowledge needed to proceed with system and network administration. This book contains many real life examples derived from the author's experience as a Linux system and network administrator, trainer and consultant. They hope these examples will help you to get a better understanding of the Linux system and that you feel encouraged to try out things on your own.
Click Here to receive this Complete Guide absolutely free.
I'm studing and practicing on setting up a mail server.
I'd like to set up a postfix with mysql (for virtual mailboxes / domains) + courier (for pop3/imap) + sasl + TLS and may be a webmail and may be some other usefull tools lika spamassassin.
But I've got a basic "conceptual" doubt before putting my hand on this task:
In postfix configuration (main.cf) you define a network or hosts for which the MTA will relay mail, using MYNETWORK parameter.
sasl can add authentication and TLS privacy for the connection. So, eventually a MUA outside MYNETWORK -let's say somewhere in internet- could authenticate in a sure way and then use the MTA to send mail through it. Is this right?
Even MYNETWORK restricts the relay in order for MTA not to be an "open relay", let's suppose MYNETWORK=192.168.1.0/24, can others MTAs outside MYNETWORK deliver mail to my MTA? (Assuming that domains for final deliveries and their MX dns flags are well configured).
If this postfix is behind a firewall which ports should be opened? 25, 110, 143...?
Thanks clarifying my doubt!
I found that at my home internet connection my ISP has blocked incoming connections to port 25, so I'll have to do the installation in another environment. Or not to receive mail, just sending or relaying to another MTA.