yes - go to:
admin > server > Email > Outgoing mail configuration
find the setting "No-reply address" and change it from noreply@v19.mroomstech.com to something more suitable - preferably using the same domain as your existing website.
Moodle doesn't send the e-mails using the posters e-mail address by default anymore as many email clients now check SPF records and may flag some e-mail as spam if the posters email address doesn't match your Moodle servers e-mail.
for example - if your moodle server was "mysite.moodle.org" and the posters e-mail was "Anna@university.com" the email client will check to see if "moodle.org" server is allowed to send email as "university.com" - which will probably fail and so the e-mail client may flag your e-mail as possible spam.
You can modify this by setting the "Allowed email domains" setting on the same page as your noreply address.
If you want to learn more about this try a google search for "SPF rules"
(I presume you are/were a client of Blackboard/MoodleRooms - mroomstech.com is owned by them and this noreply address was probably set by default when you first set the site up with them.)