Quote Originally Posted by Alex80 View Post
Yes, "прикрепить" is correct word for attaching emails.
Also, informally, we use the word приатта́чить.
Tragedy of Russian language tech terms is that people would rather use English barbarisms accompanied by Russian prefixes and suffixes than the official Russian terminology.

Quote Originally Posted by Alex80 View Post
Tragedy of russian language tech terms is not adopting e- suffix for shotcut of "electronic" so we are saying they all in the full length: электронная почта, электронное письмо…
In most cases, it is just почта and письмо. Physical paper letters are quite rare things and can be referred to as бумажные письма informally.