if you are in doubt about whether a character is a metacharacter in a regex, there is no harm in tyring to escape the sign. Then f.i. you could do this with the '@'-sign as you did it with the dot.

For letters and numbers you should use the \w-metacharacter. \s means all sorts of whitespaces.

so

$match =~ /\@(\w+)\./;
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should do the job.

Apart from that is a view at man perlre highly recommended.

greetings, tos