Update exim.md
Update exim.md

these setting changes prevent random unauthenticated errors
katieporter/docs,Zaftula/docs,hardikjain29/docs,Zaftula/docs,sendgrid/docs,ksigler7/docs,hardikjain29/docs,Zaftula/docs,hardikjain29/docs,katieporter/docs,hardikjain29/docs,Aonepathan/docs,katieporter/docs,ksigler7/docs,Aonepathan/docs,jacobmovingfwd/docs,jacobmovingfwd/docs,Aonepathan/docs,jacobmovingfwd/docs,jacobmovingfwd/docs,Zaftula/docs,sendgrid/docs,jacobmovingfwd/docs,Aonepathan/docs,Whatthefoxsays/docs,sendgrid/docs,Aonepathan/docs,hardikjain29/docs,Whatthefoxsays/docs,katieporter/docs,ksigler7/docs,katieporter/docs,Zaftula/docs,Whatthefoxsays/docs