I am looking to link to some older messages that were sent via Emma between Nov 4, 2014 and Nov. 9, 2015 ---- but there seems to be a gap. All the messages that were sent during that year seem to be gone --- can someone help me locate these?
We store a mailing's response info, along with the online version of the mailing, for 18 months after a mailing is sent. The mailings you mentioned are older than 18 months so they won't be available in Response any longer.
For mailings older than 18 months, you can still view the mailing in the editor (under Campaigns), and send out a new copy if you'd like.