PHP HTML Mail - some mail servers not receiving

Shellfishman

Hi there,

I'd like to try and fix this problem but I dont know where to start.

I have a website that generates a HTML email to members via the server.
I am using a mail class called html_mailer.php

This works fantastic, until I found out that an ISP called TPG in Australia wont receive the HTML Mail.
So far it works will all other mail servers but this.

From what I have read, their mail server needs to "validate" or "verify" the incoming mail, before passing it through to the specified email.
Whether it needs to be send via SMTP im not sure.

I also have a PHPBB forum installed on the same server and I can receive any mail generated from this to my TPG mail account.

Can anyone please tell me where to start looking, or if they have come across the same problem, how did you fix it?

Thankyou in advance

Warren

bpat1434

Typically their "verification" is either a small wait while the IP and address are looked up in a database of known spam accounts or a specific response is given which would in turn make your sending SMTP server try and send the email again using a different MX record. The second time the email comes in, it will more than likely go through.

I've also known some hosts to actually block ISPs (specifically US based IPs) because of SPAM.

If you're not using an SMTP account (i.e. a real account that you have) I would try that first. Move it over to use your account. Then if it works, you know that you can (1) keep it as sending from your account or (2) create a new mail account just for sending mails from your site. I'm sure phpBB uses SMTP as the preferred method over sendmail. But either way, it should work.