Email Server High Availability


 
Thread Tools Search this Thread
Top Forums UNIX for Advanced & Expert Users Email Server High Availability
# 1  
Old 03-09-2016
Email Server High Availability

Hello,

We are planning to setup a Email server with High Availability for email services so that if SMTP/POP/IMAP goes down on one server, the services switch to second server.
We are planning to use a Linux machines from a hosting provider and will do it using DNS with multiple MX records with round robin.

Now i have couple of queries regarding this setup :-
  • Is this possible to have a same domain name to bind with 2 IPs i.e xyz.com point to 1.1.1.1 on one server and xyz.com point to 2.2.2.2 on second server.
  • How can we setup MX records for each server on DNS for email failover.
  • As we have a separate servers for this setup that means data related to email would be reside on separate server (because they have separate HDD), so in case 1st server goes down and it switch to second server, will i skipped my email which was received on 1st server before it goes down as my email client will receive them on certain period of time.

Please let me know if above is a valid query.
Login or Register to Ask a Question

Previous Thread | Next Thread

7 More Discussions You Might Find Interesting

1. Red Hat

Redhat: High Availability

Hi, I want to create gfs storage. But getting error as below: --> Finished Dependency Resolution Error: Package: pacemaker-1.1.12-22.el7_1.2.x86_64 (rhel-ha-for-rhel-7-server-eus-rpms) Requires: sbd You could try using --skip-broken to work around the problem You could try... (1 Reply)
Discussion started by: mzainal
1 Replies

2. Solaris

High availability

hi guys I posted problem last time I didn't find answer to my issue. my problem is as below: I have two servers which work as an actif/standby in high availability system. but when i use command HASTAT -a i have the following message: couldn' find actif node. the servers are sun... (1 Reply)
Discussion started by: zineb06
1 Replies

3. Red Hat

Redhat 5 High Availability Add-on

Hello Experts, I have a question about Redhat HA Add-On, how can i setup an Active/Active Cluster using Redhat 5.7 64Bit, with Round-Robin technique. Each server will run an application and oracle database without RAC. Thanks (0 Replies)
Discussion started by: karmellove
0 Replies

4. AIX

AIX high availability 1-3/69

Hi, Can someone help and give the answer for the following questions: 1. When PowerHA SystemMirror 7.1 is installed on AIX 7.1, what RSCT component does Cluster Aware AIX (CAA) replace? A. Group Services B. Resource Manager C. Topology Services D. Resource Monitoring and Control... (2 Replies)
Discussion started by: walterchang100
2 Replies

5. UNIX for Dummies Questions & Answers

iscsi high availability

Hi, I want to set up a iscsi high availability with sheepdog distributed storage. Here is my system set up. Four nodes with sheepdog distributed storage and i am sharing this storage through iscsi using two nodes as well as using a virtual ip set up using ucarp.Two nodes using same iqn. And... (0 Replies)
Discussion started by: jobycxa
0 Replies

6. UNIX for Advanced & Expert Users

High availability/Load balancing

Hi folks, (Sorry I don't know what its technology is termed exactly. High Availability OR load balancing) What I'm going to explore is as follows:- For example, on Physical Servers; Server-1 - LAMP, a working server Server-2 - LAMP, for redundancy While Server-1 is working all... (3 Replies)
Discussion started by: satimis
3 Replies

7. AIX

AIX and port trunking / high availability

Hi all I was just wondering what modes AIX supports for port trunking ( bonding, etherchannel, link aggregation or whatever you want to call it ) I'm in particular looking for a high availability mode ( other than 802.3ad ) (2 Replies)
Discussion started by: art
2 Replies
Login or Register to Ask a Question
Server::Client(3pm)					User Contributed Perl Documentation				       Server::Client(3pm)

NAME
Net::SMTP::Server::Client - Client session handling for Net::SMTP::Server. SYNOPSIS
use Carp; use Net::SMTP::Server; use Net::SMTP::Server::Client; use Net::SMTP::Server::Relay; $server = new Net::SMTP::Server('localhost', 25) || croak("Unable to handle client connection: $! "); while($conn = $server->accept()) { # We can perform all sorts of checks here for spammers, ACLs, # and other useful stuff to check on a connection. # Handle the client's connection and spawn off a new parser. # This can/should be a fork() or a new thread, # but for simplicity... my $client = new Net::SMTP::Server::Client($conn) || croak("Unable to handle client connection: $! "); # Process the client. This command will block until # the connecting client completes the SMTP transaction. $client->process || next; # In this simple server, we're just relaying everything # to a server. If a real server were implemented, you # could save email to a file, or perform various other # actions on it here. my $relay = new Net::SMTP::Server::Relay($client->{FROM}, $client->{TO}, $client->{MSG}); } DESCRIPTION
The Net::SMTP::Server::Client module implements all the session handling required for a Net::SMTP::Server::Client connection. The above example demonstrates how to use Net::SMTP::Server::Client with Net::SMTP::Server to handle SMTP connections. $client = new Net::SMTP::Server::Client($conn) Net::SMTP::Server::Client accepts one argument that must be a handle to a connection that will be used for communication. Once you have a new client session, simply call: $client->process This processes an SMTP transaction. THIS MAY APPEAR TO HANG -- ESPECIALLY IF THERE IS A LARGE AMOUNT OF DATA BEING SENT. Once this method returns, the server will have processed an entire SMTP transaction, and is ready to continue. Once $client->process returns, various fields have been filled in. Those are: $client->{TO} -- This is an array containing the intended recipients for this message. There may be multiple recipients for any given message. $client->{FROM} -- This is the sender of the given message. $client->{MSG} -- The actual message data. :) AUTHOR AND COPYRIGHT Net::SMTP::Server / SMTP::Server is Copyright(C) 1999, MacGyver (aka Habeeb J. Dihu) <macgyver@tos.net>. ALL RIGHTS RESERVED. You may distribute this package under the terms of either the GNU General Public License or the Artistic License, as specified in the Perl README file. SEE ALSO
Net::SMTP::Server::Server, Net::SMTP::Server::Relay perl v5.10.1 1999-12-28 Server::Client(3pm)