I'm trying to find a way to retrieve emails that did not reach the recipient, i.e. if the web editor typed the wrong address in edit mode in a contact form. The customer that's asking for this used to have this functionality in their old web site that was running on EPiServer CMS 5 and IIS6 with an SMTP virtual server for mails. The current site is EPiServer CMS 6 R2 and IIS7 and uses Exchange as a mail server. My question is, is there any other way to fetch these mails with erroneous mail addresses than changing the mail server? Could this cause unpleasant side effects in i.e. subscription jobs or other things? Any suggestions or instructions as how to do this in a good way would be greatly appreciated!