I am currently using SBS2011 Windows Server Std. i am using exchange to send out e-mails i have started getting bounce backs for some of my e-mails , only a couple of e-mail address not them all. I have changed the outgoing mail server on exchange to dns and tested no joy then mail1.eircom.net still no joy. i have attachted bounce back message below.
Can anybody help me out with this ? 1st-Bounce-Back.docx 2nd-Bounce-Back.docx