A little bit off-topic, but since we have once again come to the mighty powers of The GREP , what GREP-related (ID-specific) learning resources would you recommend for a novice?

Broaden the frame of the 2nd picture until every paragraph fits nicely into one line.
Double-click into the frame (Cursor becomes active).

Search Text for ^t^t^t^t^p
Change Text to ^t
Edit > Select all.
Table > Change Text to Table
Select the rows you don’t need and delete them.

Because: At least this text was not such a mess – it has a nice pattern just from the beginning!

Can I propose another method ? Using Peter Kahrel’s script chain_grep_queries, it is easy to select text you want. Has you know, with Test mode “the script collects all instances matched by the Find What expressions in all selected queries and lists these matches in a new document.” In your example, you had just to write a regex to find e-mails.