^start of string
\w+any word character, repeated at least once
*repeats the group contents below any number of times:
-the literal - (4510 / 558 / 2D16)
+the literal + (4310 / 538 / 2B16)
.the literal . (4610 / 568 / 2E16)
'the literal ' (3910 / 478 / 2716)
\w+any word character, repeated at least once
@the literal @ (6410 / 1008 / 4016)
\w+any word character, repeated at least once
*repeats the group contents below any number of times:
-the literal - (4510 / 558 / 2D16)
.the literal . (4610 / 568 / 2E16)
\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
Character Class[A-Z0-9]{2,6} {2,6}matches between 2 and 6 characters from the set below:
A-Zone character from A (6510) to Z (9010) (case insensitive)
0-9one character from 0 (4810) to 9 (5710)
Group 3([-.][A-Z0-9]{2,6})* *repeats the group contents below any number of times:
-the literal - (4510 / 558 / 2D16)
.the literal . (4610 / 568 / 2E16)
Character Class[A-Z0-9]{2,6} {2,6}matches between 2 and 6 characters from the set below:
A-Zone character from A (6510) to Z (9010) (case insensitive)
0-9one character from 0 (4810) to 9 (5710)
$end of string
i modifier: insensitive. Matches without distinguishing uppercase and lowercase letters