Backslash it in cases of double-quotish interpolation. 
    my $mailaddy = "collaborate_logs\@ex.sdd.hp.com";

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The example you gave, though--single quotes--doesn't require backslashes, because the @ is not interpolated. So you shouldn't be having a problem there. You would, however, have a problem in double-quotes and backticks.

If you're interested in learning more about this, read Mark-Jason Dominus's article What's That Mean?.

In reply to Re: Simple @ Question by btrott
in thread Simple @ Question by jay-d

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