I use vpopmail on qmail. I have many customer domains on that mail server.One of these customer domains tells me that, they rarely receive the same mail a few times. That problem becomes nearly once a week for this customer.
I haven't any complain from my other customers. They use outlook or o.express for their mails. What may the problem be ?
Do I have to change my configuration ?
!DSPAM:4aaa2ee432719078915881!
