Good afternoon,
I recommend for our clients the ability to have CrossBox.io as an email option, as well as integration with the MailChannels API for sending emails.
Crossbox: https://crossbox.io/ Mailchannels: https://www.mailchannels.com/
Thanks
Enhance allows you to set up a smart host which will help you use mailchannels.
Please see https://community.enhance.com/d/117-crossbox-integration-modern-email-solution-roundcube-alternative
