Mail server software is great at allowing you to do a better job of meeting your goals online. The important thing is to make sure that you avoid a few pitfalls, and focus on a few tips to help get the mail server up and keep it working efficiently.
1–Scan for Spammers
It’s a fact that people will just try using mail that’s both coming in and going out for nefarious schemes. You need to make sure you realise this and that you’re scanning constantly on both sides of the spectrum for all sorts of threats. These threats could include malware, spammers, viruses, Trojans, phishing schemes and so on.
2-Watch the Banners
Banners being used in email are often exploited by people trying to steal information from people on the server. It’s actually possible to get information from people no matter what you do through email, but it requires a huge amount of effort and skill and patience most of the time in order to pull this off. As a result, many people trying to pull info from a mail server will do so with some sort of automated program or service that reads the banners in an email automatically and derives sensitive information from that. But, if you use your mail server software configurations to make sure the email server has a custom banner that won’t give out this information no matter what is used on it, this will go a long way to making sure that everything is secure.
3-Match Capacity to Needs
You definitely don’t want to pay for mail server programs that have way more capacity and capabilities than you will need, as that would be a colossal waste. This is why it’s important to actually look on the box of the mail server program you’re using to see what it can do and whether you’ll really need all of that. If you’re running an office that only has 6 units, then you don’t need capacities of hundreds, and you don’t need hundreds of terabytes of data storage capacity either.
4-Set Sane Limits
In the same vein, you need to keep in mind what your capacity is on the server and what it can reasonably handle and what it can’t. If the capacity is small, you will need to set the limits in terms of file attachments on the mail server to something that will reflect that. Otherwise, someone will send a 100 MB PDF file to 30 people and crash the server. It can be that simple.
It’s also important to make sure that you have the machines capable of handling the mail server software you want to use. Many enterprise level solutions for mail servers need an additional amount of hardware power in order to function. This means really expensive and powerful server machines. This also can require a huge amount of RAM, as well as hard drive tech that’s on the cutting edge in order to make sure everything flows smoothly through the mail server.
The thing you have to worry about when using mail server software is DOS attacks. This is an attack where someone connects to your server over and over again in order to shut it down. You can guard against this problem with your software by limiting the number of connections to the SMTP server. Exactly how much you should limit connections will depend a lot on what hardware you’re using. For example, the memory, bandwidth, CPU power and so on could all alter where you should set the limitations. But at the least you should limit total number of connections, total simultaneous connections to the mail server, and so on.
7-Use Reverse DNS
This technique will help insure that bogus senders don’t get anywhere on your system. This essentially makes sure that the sender’s IP matches with both the host and domain names used by the client before verifying and allow it access to the mail server.
Utilising the above tips will ensure you have a robust mail server which works for you, not against you.