We have a intermittent problem with wanadoo.fr emails.
We sending out via our own exchange 2003 server and we getting a number of error 5.5.0, 5.1.1, 5.7.1 so we changed the connector to replay via smtp.wanadoo.fr we sometimes get emails back now saying 5.50 relaying denied. I have tried putting back authentication but this just stops messages being relayed.
We use a standard ISDN connector through a router gateway and can all share internet access.
Is there anyway of getting Wanadoo to be more stable to relay via our own server?
Any help would be greatful.