Yes, you can. Though as another commenter mentioned, doing it like you currently attempted to, is way too much of a hassle.
That is, don’t try and negotiate your own SMTP session and content. Being POP_OS is Ubuntu based, you should be able to use the mail
command from mailutils
package
echo "Is this working?" | mail -s "Subject" recipient@email-address.org
Also might want to consider something like Apprise (Everything and the kitchen sink) or NTFY (Does one thing, does it well) for other types of notification methods.
I think that question is definitely a worthy cause, but entirely misplaced. As others said, they donated to Beehaw not to some other foundation or charity. Rainy day fund is better than an oh shit, we’re broke moment. I am extremely grateful to those who have and continue to donate towards Beehaw’s Cause. We need to make sure that money is used, when needed, as expected.
Let it ride.