php mail being marked as spam by the big providers

Hi all,

About 20% of my user base registers with my site using either Hotmail or Gmail. I’m becoming really fed up with dealing with helpdesk enquiries from users who don’t receive (or say they don’t receive) email from us.

These two providers seem to be becoming more and more aggressive with their mail filtering to the point where it seems to be virtually impossible to deliver into their inbox.

I was just wondering whether anyone on here was running sites which had encountered similar problems, and if so, what techniques might have been employed to remedy the situation.

you may want to double check the reputation of your public IP address and domains hosted on your mail server here:

If you IP has a bad reputation, or is on any blocklist you will have issues until you resolve the problem.

good luck!

Another RBL check: