...
ActionMailer::Base.mail(from: 'no-reply@sciencehistory.org', to: 'erubeiz@sciencehistory.org', subject: 'Test message from Eddie. Please ignore.', content_type: 'text/html', body: 'Testing').deliver_now
DKIM
We started using DKIM to prove our ownership of the sciencehistory.org email domain in March 2024.
See settings in AWS .