Apple / SMTP error code 421

smtp;421 4.7.1 Messages to example@icloud.com deferred due to excessive volume. Try again later - https://support.apple.com/en-us/HT204137

Medium severity

The email address is currently receiving an email at a high rate. Sending email in the future will most likely be successful.

▓▓▓▓▓▓▓▓▓░▒▓▒█░░██▓▒▓▓▓▓▓▓▓▓▓▒▒░▓▓▓▓▓▓▓▓▓▓▓▒▒█▒░▓▓▓▓▒█▒▓░▒▒▒▓▓▓▓▓▓▓▓▓▓░░█░░▒▓█▓▓▓▓▓▓▓▓▓▓▓░▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓░▓░▒░█░▒▒▓▓▓▓▓▓▓▓▓▒░▓▓░▒░▓▒█▒▒▓░▒▓▓▓▓▓▓▓▓▓▓░▒▒▒░░▓▓▓█░▒▒░░░▒░▒░▓░▒░▒░▓▓▓▓▓▓▓▓▓▓▓▒▒▒░░▒▒▒▓▓▓▓▓▓▓▓▓░░▒▒▓▓▓▓▓▓▓▓▓▒▒▓▓░▒█▓▓█░██▒▒▒░░█▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒▓▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓░█░░▓▒▓▒▒▓▓▓▓▓▓▓▓▓█▓░█░▒▓▓▓▓▓▓▓▓▓▓█▓░▓▓▓▓▓▓▓▓▓█▓▓▓▓▓▓▓▓▓▓▒░█░▒▒▒▒░▓▓▓▓▓▓▓▓▓▒▒▒▒▒▒▓▓▓▓▓▓▓▓▓▓░▒▒▓▓▓▓▓▓▓▓▓▓▓▓▒▓░▓░██▓▒░▒▓▓▓▓▓▓▓▓▓▓▒░▒░█▒▒▓▓▓▓▓▓▓▓▓░▓▓█▒░█░▓▓▓▓▓▓▓▓▓▒█▓▒░▒░▓▓▓▓▓▓▓▓▓▒░▓░░█░▒▓▓▓▓▓▓▓▓▓░▒▒█░▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓░░░▓▓▓▓▓▓▓▓▓▒▓▒░▒▓▓▓▓▓▓▓▓▓░▒▒▒░▒▒▓██▓░▒▒░▓█░▒▒▒▒▓▓▓▓▓▓▓▓▓░░▓▓▓▓▓▓▓▓▓▒▒▓▓▓▓▓▓▓▓▓▓▒▒█▒▒▒░░█▒░░▓▒█▒▓▒░░░█▓▓▓▓▓▓▓▓▓▒▓▒▒░▓▓░█▒█▓▓▓▓▓▓▓▓▓░▓▒▓▓▒▓░▓▒▒▒▓▓░░▓▓░▓░░░▒░▒▒▓▓▓▓▓▓▓▓▓▒█▓░█▒▒░▒▒░▒▒▓▓▒▒▓▓▓▓▓▓▓░▓▓▓▓▓▓▓▓▓▒▒█▒▒▒██▒░█▒▒░▓▓▒░▒▒▒▒▓▓▓▓▓▓▓▓▓▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓█░▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓█░▓█▒█░▓▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓█▓░░▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓░▒░▓▒▓▒▓▓▓▓▓▓▓▓▓▓░▓▒▒█▓▒▒░▒█▓▓▒▓▒▓▓▓▓▓▓▓▓▓▓▒▒▒▓▓▓▓▓▓▓▓▓▓▓█▒▒█▓▓░░▒█▒░▒░░▒▓░░▓▓▓▓▓▓▓▓▓█▓▓░░▒▒▒░█▒

Built with

▒▓█▓▓▓▓▓▓▓▓▓█▒▒░░█▓▒▓▓░▓▓▓▓▓▓▓▓▓▓▓▒▓▓▓▓▓▓▓▓▓▓░▓▓▓▓▓▓▓▓▓▓▓░▒▒▒█░▓▓▒░▒▓▓█▓▓▓▓▓▓▓▓▓█░▓▓▓▓▓▓▓▓▓▓█▓░▓▓▓▓▓▓▓▓▓▓░▓░▓▓▓▓▓▓▓▓▓▓▓░█▒▓▓▓▓▓▓▓▓▓▓█▓▒▒▒▓▓▓▒▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓░▒▓▓█▒▒░▒█▒█▓░░▒▓▓▓▓▒▓▓▓▓▓▓▓▓▓▓█▓▓▓▓▓▓▓▓▓▓▒▒░▓▓▓▓▓▓▓▓▓░░█▒▒▒▓░█▒▓█▒░▒▓░░▒▒▓▓▓▓▓▓▓▓▓▒▒▒░▓▓▓▓▓▓▓▓▓▓░░▓▓▓▒▒█▓░▓▓▓▓▓▓▓▓▓▓▒░▓▓▓▓▓▓▓▓▓▓▒▒▓█░▒░█▒▒░▓█░▓█▒▒▒░▓▒▒█▓▓▓▓▓▓▓▓▓░░▒░░▒▓▒▓▒█▒▓▓▓▒▓░▒█▓░▒░▒▒▒▒░▓▓▓▓▓▓▓▓▓▓▒█░▓█▒▓▓▓▓▓▓▓▓▓░▒▓▒▓██▓░░▒▓▒░▓█▒▒▓█▒▓░▒▒▓▓▓▓▓▓▓▓▓▓▒▒▒▓▒░▒▒█▒░░█░▒░░░▓░▓▓▓▓▓▓▓▓▓░▒░░▒▓▓▓▓▓▓▓▓▓░▒▓▒▓█▒▓▒▒▓▓▓▓▓▓▓▓▓█▒▒░▒▒░▒░░░▓▓░░▒▓░▒░░░▒██▒░▓█▒░▓▓▓▓▓▓▓▓▓▓▓▒█░░▓▓▒▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▓▒░░▒▒▓▒▒▓▓▓▓▓▓▓▓▓▓█▒▒▓█▒▒▒░▓▓▓▓▓▓▓▓▓▓█░▒▒▒▓▒▓▓▓▓▓▓▓▓▓▓░░▓▓▓▓▓▓▓▓▓░▒▓▓▓▒▒▓▓▓▓▓▓▓▓▓▓▒▒░▒▓▓▓█▓▒░▒▒▒░▒▒▒▒▒▓▓▓▓▓▓▓▓▓▒▓█▒░▓▒▒▓▓▓▓▓▓▓▓▓░▓█░▒░▓▓▓▓▓▓▓▓▓░▒▓▓▓▓▓▓▓▓▓░▓░▒█▒██▓▓▓▓▓▓▓▓▓▒▒▒▒▒░▒▒▒░▒▓▓▓▓▓▓▓▓▓▒░▓▓▓▓▓▓▓▓▓▒░▒▓▒▓▒▒▓▒░░▒▓░▒▒▓▓▒▒▒▓▓▓▓▓▓▓▓▓░░▓▒█░▓░░▓▒░▒░░▓▓▓▓▓▓▓▓▓▒▓▒▒▓▓▓▓▓▓▓▓▓▓▒▒▓▓▓▓▓▓▓▓▓▓▓█▓▓░▒█░▓▓▓▓▓▓▓▓▓▓▓▒▓▓▒▒░▓░░▓▒▒▓▒▓▒