we are running Groupwise 6.5 and has been working fine until 2 weeks ago when some of our clients got undeliverable
mails notification from his postmaster with the following message: " These recipients of your message have been processed by mail server: email@example.com; Failed; 4.4.7 (delivery time expired)
the strange thing is that we could receive from other clients. We have about 10-20 different clients with different domain names that could not reach us.
all of our emails could be received.
They could not receive my hotmail emails but could receive my verizon email account. It happens on accounts that do not have junk mail block/list feature activated.