I am using AWS SES and when I do a test email it works without issues, however when a new user registers they don't get the email validation and when I try resending it doesn't work either.

Thanks for the feedback will definitely try the SES method instead.

My mailbox definitely has no sent mails from NodeBB. So I may have set it up incorrectly or SendMail really is problematic.

Thanks a lot I will try this and see how it goes.

How do I configure the Amazon SES Emailer using the Default Emailer Plugin

Once I select the Amazon SES option it does not give me an option to configure the following:

Enter SES Credentials and Settings:
Access Key ID: Enter your AWS IAM access key ID.
Secret Access Key: Enter your AWS IAM secret access key.
Region: Specify the AWS region where your SES service is located (e.g., us-east-1).

I have setup 2 instances of Nodebb on a single vps, each instance is in a seperate folder namely ("var/www/nodebb1" and "var/www/nodebb2")

When I installed Sendmail on the root, everything installed successfully, however when I enter my Email settings on the Email settings option and try and send a test email I get a "test email sent successfully message" but the email never sends and on the root of the vps when I log in I see a Console message that says "You have new mail"

Anyone able to help out on how I can resolve this?