Sorry to bring this here but I cannot see what my problem is!! email to cogeco.ca is being rejected with the folowing message
<recipient address hidden> host MX.cogeco.ca[216.221.81.26] said: 451 Postmaster Code 5 - #4.1.8 Domain of sender address<j...@klam.ca> does not resolve. Le domaine<j...@klam.ca>, utilis?? pour envoyer le courriel, ne se r??sout pas. (in reply to MAIL FROM command) However every test that I perform comes back normal. I have also used offsite services such as MXtools, dnsstuff; neither of them show any problems. What am I missing? John A