Hi I have been receving the error message, when I send e-mails to few domains. The following message could not be delivered to <domain.com>. The destination server reported: 554 denied by gorbs From: <me@xxxxxxxxxxxx> The recipient name is not recognized The MTS-ID of the original message is: c=US;a= ;p=KAMPSAX;l=KILMX01-040827035914Z-21210 MSEXCH:IMS:KAMPSAX:Delhi:CPQ01 3554 (000B09B6) 554 denied by gorbs I could not make out and there seems to be no documentation with the word GORBS and there was little response from the list also. Just to add, my server is not an open relay, it has PTR and SPF1 records as well. This problem has started to come around from 15th August onwards. Thanks Chand