Hi All,

I have seen in past few days, few mails have been sitting in Poison queues in our Exchange 2019 servers. Sometimes there are no errors with those mails, sometimes it says “LED=530 5.3.0 Too many related errors” , sometimes “LED=421 4.4.2 Connection dropped due to ConnectionReset”.

The mail’s been delivered to other recipients but for some recipients the mail is queued up in Poison queues.

So, not sure why the emails are qualified as poisonous, need some info on what we can do as admins on such situations?

I know that we can either export the messages manually or just reject these messages with/without NDR.

​Hi All,I have seen in past few days, few mails have been sitting in Poison queues in our Exchange 2019 servers. Sometimes there are no errors with those mails, sometimes it says “LED=530 5.3.0 Too many related errors” , sometimes “LED=421 4.4.2 Connection dropped due to ConnectionReset”.The mail’s been delivered to other recipients but for some recipients the mail is queued up in Poison queues.So, not sure why the emails are qualified as poisonous, need some info on what we can do as admins on such situations?I know that we can either export the messages manually or just reject these messages with/without NDR.  Read More