On Tue, 10 Jan 2017 20:26:05 +0000 "Cena, Stephen (ext. 300)" <s...@qvii.com> wrote: > Set($RTAddressRegexp, '(local-part1@domain1\.tld)| > (local-part2@domain2\.tld)| > (local-part3@domain3\.tld)| > : > : > (local-partN@domainN\.tld)/xi');
If you want to use the /x modifier, provide a regular expression object, not a string: Set($RTAddressRegexp, qr/ (local-part1@domain1\.tld)| (local-part2@domain2\.tld)| (local-part3@domain3\.tld)| : : (local-partN@domainN\.tld) /xi ); Tangentially, the inner grouping ()s are not necessary here, but you will want to anchor the regular expression to the start and end of what it's matching. And you'll need to escape the "@" signs: Set($RTAddressRegexp, qr/ ^ ( local-part1\@domain1\.tld | local-part2\@domain2\.tld | local-part3\@domain3\.tld | : | : | local-partN\@domainN\.tld ) $ /xi ); - Alex