The Print2Email can be configured to send Text email only without attachment, silently without any user interaction, using the Content Based Email Sending option.
Go to Print2Email > Advanced Tab > Check the "Enable Content Based Email Sending" option.
In the Print2Email Printer Settings, go to the Text Output tab, and enable the Generate Text Output option.
Example of the embedded command below includes one email address, subject field, and email body text:
##~~EmailTo=tester@blackice.com~~
##~~ES=Test subject~~
##~~EB=Test email body~~
Once the document is printed, and send email silently is disabled, the email client should look the following.