Configure postfix or other MTA as a MX backup for * domains

Hello. I would like to help you with installation secondary email server. I have experience. Please read my feedbacks. Thank you.

Hi, We help customers do business better by leveraging our industry-wide experience, deep technology expertise these technology includes setup and management of different Linux web hosting servers like CentOS, RedHat, Ubuntu, Debian etc. We provide so prompt project delivery, thus we perform our responsibilities precisely with our scrupulous attention and full dedication. We have expert level knowledge in web hosting panels like cpanel, plesk, webmin , ispconfig, zpanel, Direct admin etc. Initial server setup steps:- Install LAMP Bind to name server Install Postfix for send the mails Install Dovecot to receive the mails Install vsftp etc. Install panel All linux flavours supported Services Support:- Apache,IIS, Tomcat, DNS, Windows ASP.NET, PHP, Java, AWS, MSSQL, MySQL Exim, Postfix, sendmail, Mail Enable, smarter mail, powermta etc. Server Log Monitoring:- Techs will be monitoring the Server Logs Restart Services if necessary and required Fix issues if any of the services have problems Basic Server Security:- Server Securing and Hardening CSF Firewall Installation & Configurations LFD Alerts on Brute Force Attacks SMTP Tweaking PHP Hardening (SUPHP, SUHOSIN ) Mod_security Setup and Configurations Root Login Email Alerts Server Migrations:- Backup Restorations, Database Restorations from Secondary Backup Disks etc. Cpanel to Cpanel Server Migration ( WHM Transfer/Rsync/SCP ) Additional Charges Applied for Server Transfers having more than 30GB of Data Thank you

Hello! I have right skills and great experience for begin working on your project just right now! You may show good reviews at my profile.

To whom it may concern, I have 15+ years of experience in *nix systems. I'm mostly building my own server solutions with LFS. I have been building, administering and hardening servers including Postfix servers for the past 8 years. There are still some open questions in regards to your description. Otherwise, I'm at your disposal for further questions. Regards, Daniel

Hi, I can help you with this project. Linux sysadmin here with 10+ years experience. Your project is doable, however there are some caveats: - You cannot be a secondary MX for any domain without any configuration, unless you want your server to become a secondary MX for the entire internet! You _need_ configuration to tell your MX for which domains it will accept mail. - Your server must know which users are valid for any domain it relays mail for, so it must obtain a up-to-date list of users for every domain. It can do so in real-time (e.g. connecting to a LDAP or MySQL server) or in batch mode (primary MX generates a table of users and rsyncs it to secondary MX)

I have been working with postfix for more than seven years, and I consider myself to be one of the top postfix administrators in freelancer. Some of your requirements cant be done, because, if you dont tell postfix which domains to accept mail for, how would it know which emails to accept and which ones to reject? It has to become a honeypot if it cant know which domains to accept mail for.

Hello, As someone whose focus are mail servers, I'm quite interested on working on this with you. A backup MX is initially quite simple, but let me quite two of your sentences that make it complicated: 1) It needs to be for an unlimited domains (ie any domain, no configuration should be needed to add additional domains, no MX backup records should be checked on the domain dns part) 2) Should cache valid (for at least 4 hours) and non valid recipients (for 5 minutes). How will it tell if a mail address is valid or not if the main server is down and you don't want to set up specially any mailbox (list) on the backup? That's the only question for now. Best Regards, Istvan

A proposal has not yet been provided

I am having more than 4.5 years of experience and have set postfix for bounce collection on daily basis.