matching multiple static email addresses in a variable

I have a variable called ME which is defined like this:

ME="(one(_at_)place\(_dot_)com|another(_at_)elsewhere\(_dot_)org|still(_at_)yetanother\(_dot_)gov)"


Then I want to be able to use it in recipes such as

:0
* ^To:.*$ME
{ blah blah blah }

But it doesn't seem to work.

I've tried a few variations but all of them seem to be missing something.... see
brief log excerpt below:

procmail: No match on "^To:.*$ME"
procmail: No match on "^To:.*$ME"
procmail: No match on "^To:.*"$ME""
procmail: No match on "^To:.*($ME)"
procmail: No match on "^To:.*($ME)"


is there a way to do this? (I'm sure there is)

so what really simple thing am I overlooking?

TIA
TjL

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