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  • Your best bet is probably your mail system's logs or outbound mail archive. Commented Jun 7, 2013 at 11:23
  • do you know the command to grep every text file on the system for a given string? I will search for "7z a -p" . Commented Jun 7, 2013 at 11:25
  • 2
    Chances are about 0 that that string will have been logged unless you've specifically set up auditing or non-default levels of logging of some sort (not even sure there are logging options for that in PHP). Commented Jun 7, 2013 at 11:27
  • 1
    (BTW your option #2 is illegal in some places, regardless of the reason you'd do that.) Commented Jun 7, 2013 at 11:28
  • LOL yeah I guess that's not my responsibilty, I just have to make the server secure. I think I'll hash the email address as well. Commented Jun 7, 2013 at 11:30