Hey there, I see from the background that your configuration value is actually not correct. The value should not be an email address, but the SMTP server address.
You will need to follow discourse/docs/INSTALL-cloud.md at main · discourse/discourse · GitHub
The address value in the settings should not be an email address but a mail server address. e.g. if you are using mailgun
DISCOURSE_SMTP_ADDRESS: smtp.mailgun.org
DISCOURSE_SMTP_PORT: 587
DISCOURSE_SMTP_USER_NAME: postmaster@fooros.co
DISCOURSE_SMTP_PASSWORD: "the password your email server provider shares with you"
Also, a warning - please do not repost the same issue into different topics.