You can make a system service so that this always happensĬreate this file /etc/systemd/system/smtphack. By default, Monit tool is not available from the system base repositories, you need to add and enable third partyepel repository to install monit package under your RHEL/CentOS systems.Once you’ve added epel repository, install package by running the following yum command. Then postfix will always think that you are sending from localhost. This is also useful for security reasons - you can monitor the md5 or sha1 checksum of files that should not change and get an. Monit can monitor these items for changes, such as timestamps changes, checksum changes or size changes. But a quick hack is to remoteforward port 25 with SSH. You can also use Monit to monitor files, directories and filesystems on localhost. Some hacks #īy default you can only send emails from localhost - I have not figures out how to properly set this up. Now the server will throw an error whenever someone uses another email address than the allowed one in the MAIL FROM field. ![]() This is good to avoid getting blocked for abuse for using other email addresses.Ĭreate a file /etc/postfix/allowed_senders OKĪnd add this to main.cf smtpd_sender_restrictions = check_sender_access regexp:/etc/postfix/allowed_senders Most configuration in postfix can be done in /etc/postfix/main.cf Restrict mail from to come from your domain # monit is a utility for managing and monitoring processes, files, directories and devices on a Debian / Ubuntu Linux server system. In both cases the -f flag is to follow the file and show any inputs arriving while reading. You can troubleshoot the mailserver with # journalctl -f -u postfixĪnd read the logs for mails here: # tail -f /var/log/mail.log If it doesn’t work then it could be becaue your domain is blocked or because a firewall is blocking outgoing smtp traffic. Hello this is a test to see if the mailserver works. Install via ports, this will compile monit from source. The postfix service should automatically be enabled and started - if this is not the case you can do it. Install via packages, the pre-compiled binary is quick to install. Now we need to enable Monit at boot, so we don’t have to manually start it every time we update or something. Now we can go ahead and install the needed packages. Done Building dependency tree Reading state information. Restart the computer Step 3: Install postfix # apt install postfix The first thing to do is update and upgrade your servers packages. Type the following apt-get command/apt command: sudo apt-get install monit Sample outputs: Reading package lists.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |