antispam settings

Dear experts,

I've installed GFI MailEssential antispam and now I need to configure it.
There is many options turned off by default.

In these cases, I'm not sure wheather leave them disabled or enable it:
Check if the email header contains an empty MIME FROM: field.
Check if the email header contains a malformed MIME FROM: field.
Check if the email headers contain different SMTP TO: and MIME TO: fields.
Verify if sender domain is valid (performs DNS lookup on MIME FROM:)

Can you please recommend?

Jaroslav LatalMSPAsked:
Who is Participating?

[Product update] Infrastructure Analysis Tool is now available with Business Accounts.Learn More

I wear a lot of hats...

"The solutions and answers provided on Experts Exchange have been extremely helpful to me over the last few years. I wear a lot of hats - Developer, Database Administrator, Help Desk, etc., so I know a lot of things but not a lot about one thing. Experts Exchange gives me answers from people who do know a lot about one thing, in a easy to use platform." -Todd S.

John EastonDirectorCommented:
I used GFI MailEssentials for a number of years and generally found the default settings worked quite well.  However, over the years I did make some tweaks based on the spam that was getting through.

Of the four you listed above I would leave them disabled unless you see a lot of spam coming in which meets these rules.  However, I would recommend ensuring SPF checking is enabled (this effectively would cover the fourth point anyway as it would need to look up the SPF record).

Experts Exchange Solution brought to you by

Your issues matter to us.

Facing a tech roadblock? Get the help and guidance you need from experienced professionals who care. Ask your question anytime, anywhere, with no hassle.

Start your 7-day free trial
It's more than this solution.Get answers and train to solve all your tech problems - anytime, anywhere.Try it for free Edge Out The Competitionfor your dream job with proven skills and certifications.Get started today Stand Outas the employee with proven skills.Start learning today for free Move Your Career Forwardwith certification training in the latest technologies.Start your trial today

From novice to tech pro — start learning today.