That's a e-mail message sent out by cPanel during regular system checks.
The message tells you that it has found code that sends e-mail. SMF contains code to send e-mail (notifications, topic replies etc.) So the message you got is completely normal.
However, if you want to be sure that those lines are not modified by some malicious script, download those files, open them in a text editor and compare the reported lines with the same lines from stock (unmodified) SMF files. Go to the SMF Downloads
site to get stock SMF packages.
The line numbers might change if you install mods that add their own lines. Still, the idea is the same, search the reported lines in the same files (but from a stock SMF package); if each reported line matches a stock line, there's no problem.