Hit ENTER after each Tag to add it to your post; Numbers in parentheses represent the Tag's usage.
we have a user who has got 16,000 bounce backs from a varity of IP addresses... the emails are originally from a network in Russia by the looks of a sampling, but the bounces come from real ISPs and mail servers from all over.
I have reviewed the emails and they are not coming from our network. We do have an SPF in place for the senders domain.
Looking at how to stop NDRs for emails that we didnt send?