@baris Thank you! 👍
I haven't successfully set up the email part of my forum, and due to my lack of sufficient knowledge concerning email or SMTP I can only assume that even without any mailer plugin I can still use a regular email account as the sender for NodeBB.
So based on such assumption, I typed in an Outlook account but it won't work. Test email sending failed, with an alert saying:
C087470C157F0000:error:0A00010B:SSL routines:ssl3_get_record:wrong version number:../deps/openssl/openssl/ssl/record/ssl3_record.c:355:
What did I do wrong?
PS: I've created an AWS SES account, but it doesn't seem to make any sense to me as to how it should be used. And a Postmark account also, which got blocked immediately after signing up and I am still waiting for a response from its support team.
Thanks for all future help that anyone may be so kind to offer me.
The error mysteriously disappeared and was replaced by an authentication error. I managed to have my Postmark account unlocked (btw, their support team was way much better than that of Sendgird, which still hasn't responded for 2 days since I requested till I am typing right now) and found that to use Postmark in Nodemailer you have to set the server api token as both the username and the password. This is quite counter intuitive, in my opinion.
And I finally figured out that, the test email button works on your last saved settings, not what you are editing in the input boxes right now.
So now Postmark is working. Thank God.