Further to my comment above my IT man (husband) has looked at the bounced message and it would appear that monitor.mxhero.net is listed on the spamhaus CBL. The previous e-mails I have had returned were blocked by message labs which he has informed me also uses the spamhaus CBL as one of it's look ups.
Hi Alex
Further to my comment above my IT man (husband) has looked at the bounced message and it would appear that monitor.mxhero.net is listed on the spamhaus CBL. The previous e-mails I have had returned were blocked by message labs which he has informed me also uses the spamhaus CBL as one of it's look ups.
Hope this helps
Sally