Regular Expressions 101

1st Alternativesm-mta.*to=\K

sm-mtathe literal text sm-mta (case sensitive)

.*any character (except for line terminators), repeated any number of times

to=the literal text to= (case sensitive)

\Kresets the starting point of the reported match. Any previously consumed characters are no longer included in the final match

2nd Alternative\G(?!^).+?@(.+?)[>, ]

\Gstart of current search

Negative Lookahead(?!^)

^start of line

.+?any character (except for line terminators), repeated at least once

@the literal @ (64₁₀ / 100₈ / 40₁₆)

Group 1(.+?)

.+?any character (except for line terminators), repeated at least once

Character Class[>, ]

>the literal > (62₁₀ / 76₈ / 3E₁₆)

,the literal , (44₁₀ / 54₈ / 2C₁₆)

the literal (32₁₀ / 40₈ / 20₁₆)

Global pattern flags

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

Detailed match information will be displayed here automatically.

Search reference

Regular Expression

sm-mta.*to=\K|\G(?!^).+?@(.+?)[>, ]

New

Aug 15 00:01:06 **** sm-mta*** to=<user1@gmail.com>,<user2@yahoo.com>,user3@aol.com, some_more_stuff
Aug 16 13:16:09 **** sendmail*** to=<user4@yahoo.com>, some_more_stuff
Aug 17 11:14:48 **** sm-mta*** to=<user5@gmail.com>,<user6@gmail.com>, some_more_stuff

Regular Expression

Extraction