This project is for a webshops automatic mailing functions.
I am using PHP-Mailer to automatically send order confirmations, transport booking + package numbers, payment reminders etc.
All mailing functions operate very well - and causes no problems at all for 99% of my receivers. However - there are a few servers that can not/will not accept mails from my website. I have been in contact with those servers administrative people - but they keep claiming something is wrong in the way I send these mails. I suspected that they had wrongfully blacklisted my server but they have explicitally whitelisted my sending server and despite that the problem is not resolved. What happens is that after sending the mail - I immediately receive :"Delivery Status Notification (Delay)" - after a few days I receive : "Delivery Status Notification (Failure)". The receiving addresses are valid addresses.
This problem never occurs on servers like [login to view URL] , [login to view URL], [login to view URL] etc. - the problem is isolated to a few smaller operators - but I happens to do quite a lot of buisness with their clients.
To the person who can help with this troubleshooting - I will send automatic mail(s) so that you for yourself can investigate comlplete headers etc. Of course I will let you know the IP of the mailserver I am using.
PLEASE - IF YOU ARE NOT VERY FLUENT IN ENGLISH DO NOT BID FOR THIS PROJECT - PLEASE