CiviSMTP Email Service has officially shut down operations effective EOD July 31, 2022, 11:59pm PDT.
This recent post from the CiviCRM Team has very useful information about other email providers:
https://civicrm.org/blog/bgm/thank-you-civismtp
Additionally, the CiviCRM StackExchange is a great resource if you have any questions about CiviCRM:
https://civicrm.stackexchange.com/
If you have any questions, please email us at support@civismtp.com
CiviSMTP Team