I've recently inherited a BizTalk 2013 setup and am struggling to get up to speed with it.
I have a send port which generates an email when it receives an XML file - currently it sends the file as an attachment to a specific email address. My question is how can I specify a custom subject which is based on the XML file contents. Currently, the subject is hardcoded into the properties of the port.
Having a subject will greatly help sorting the emails received, of which there are dozens everyday.
You need to change your send port to a Dynamic send port, and have an Orchestration or other process that sets the SMTP.Subject property and other properties such as
e.g.
Search for the below in your favourite search engines for various examples