github.com/cs3org/reva/v2@v2.27.7/changelog/1.0.0_2020-07-28/smtp-headers.md (about) 1 Enhancement: Add required headers to SMTP client to prevent being tagged as spam 2 3 Mails being sent through the client, specially through unauthenticated SMTP were 4 being tagged as spam due to missing headers. 5 6 https://github.com/cs3org/reva/pull/970