Emails not being delivered

[ruski]

Hello friends,

 

I have a problem sending out emails from a particular email address on my organization.

The email usually contains just some HTML text without any links or images, just a bit of bold styling. I am using a php class called phpMailer to send out this email. The email address itself is "[email protected]".

The problem is that some of the recepients are not getting the email at all (not even in spam).

 

HOWEVER, when the exact same email with the same content is sent to the recepient which couldnt get the "erefs" one from a user's outlook account (email address "[email protected]") it arrives successfully.

 

I know there could be multiple causes to this problem, but I am just looking for what these causes could be so I can rule each one out untill the answer is found.

 

All suggestions would be greatly appreciated.

 

Regards,

Alex

[teamatomic]

As you said, there are many reasons.

 

A place to start is to switch to your ISP for SMTP. This will tell you is you a lot. If the mail does then go through you know the problem is on your end and is most likely due to a spam block. Some servers no longer even send rejection notices so even trying to find out why can be a job. One thing to do is to ask those not receiving the mail is who is their ISP. If its all the same then you have a place to start.

 

A good way to do this is to send two test mails to the address that does not get them. Send from your home computer. On the first use your domain's web server for SMTP, on the second use your ISP's SMTP. The one sent with your ISP's SMTP should never get blocked, the one from your websites SMTP might. If so you have a place to start.

 

One of the most common reasons is that being on a hosted server with multiple domains under the same IP is that you get blocked for spam. Not from your domain but because of another domain under the same IP.

 

Another problem is that the server you are on might have an open relay and many mail servers wont accept mail from an open relay.

 

Your servers dns reverses may not be set up properly and that will also cause some servers to reject mail from you.

 

 

HTH

Teamatomic