+"Email addresses (yanked from esmptrc)
+syntax match msmtpAddress /[a-z0-9_.-]*[a-z0-9]\+@[a-z0-9_.-]*[a-z0-9]\+\.[a-z]\+/
+" Host names
+syn match msmtpHost "\%(host\s*\)\@<=\h\%(\w\|\.\|-\)*"
+" Numeric values
+syn match msmtpNumber /\<\(\d\+$\)/
+"Strings
+syntax region msmtpString start=/"/ end=/"/
+syntax region msmtpString start=/'/ end=/'/
+