Failed to authenticate on SMTP server with username "AK********************" using 2 possible authenticators. Authenticator LOGIN returned Expected response code 334 but got code "530", with message "530 Must issue a STARTTLS command first
↵". Authenticator PLAIN returned Expected response code 235 but got code "530", with message "530 Must issue a STARTTLS command first
↵".
That sounds like the domain is not properly configured in AWS SES. I am using SES in AWS with almost all Laravel APIs i have written thus far for transactional emails and only ever had that issue when the domain wasn't approved / whitelisted.