Error in exception handler: Expected response code 220 but got code "421", with message "421-4.4.5 Server busy, try again later. (smtp.gmail.com)
421-4.4.5  For more information, go to
421 4.4.5  https://support.google.com/a/answer/3221692 41be03b00d2f7-b3f6c07ffe5sm34a12.3 - gsmtp
" in /var/www/triptio.net/vendor/swiftmailer/swiftmailer/lib/classes/Swift/Transport/AbstractSmtpTransport.php:383