not actually got that far to be fair
im now using
DISCOURSE_SMTP_ADDRESS: smtp.123-reg.co.uk
DISCOURSE_SMTP_PORT: 465
DISCOURSE_SMTP_USER_NAME: myemail@mydomain.co.uk
DISCOURSE_SMTP_AUTHENTICATION: YES
DISCOURSE_SMTP_PASSWORD: myPasswordwithCharacter#
DISCOURSE_SMTP_ENABLE_START_TLS: YES
im getting
Net::SMTPAuthenticationError
i can logon to webmail fine with same password.