Hi. We use PHP's mail() function to send our new customers welcome emails. It appears though that not every email is making it through to our customers and we are suffering reputation wise because of this. Some do still get through, but only for certain domains.
Does anyone know what the problem could be and how to solve it?
Any help would be greatly appreciated.
Thanks in advance.
Does anyone know what the problem could be and how to solve it?
Any help would be greatly appreciated.
Thanks in advance.