^start of line
Negative Lookahead(?!.{81}) .{81}any character (except for line terminators), repeated exactly 81 times
Non-Capturing Group(?:\w+[.-])* *repeats the group contents below any number of times:
\w+any word character, repeated at least once
.the literal . (4610 / 568 / 2E16)
-the literal - (4510 / 558 / 2D16)
\w{1,50}any word character, repeated between 1 and 50 times
@the literal @ (6410 / 1008 / 4016)
\w{1,25}any word character, repeated between 1 and 25 times
Non-Capturing Group(?:[.-]\w+)* *repeats the group contents below any number of times:
.the literal . (4610 / 568 / 2E16)
-the literal - (4510 / 558 / 2D16)
\w+any word character, repeated at least once
\.the literal . (4610 / 568 / 2E16)
\w{2,3}any word character, repeated between 2 and 3 times
$end of line
g modifier: global. Finds all matches instead of stopping after the first
m modifier: multiline. Causes ^ and $ to match the start and end of each line, not only the start and end of the string