Support for Implicit SMTP over TLS
Full support has been added for SMTP over TLS for
smarthosts as recommended by RFC 8314.
With this addition it is now possible to define
smarthosts that use implicit TLS on port 465 or any port of your
LMTP were supported for delivery to
destination servers while
smarthosts only used
SMTP with no
option to choose any other protocol.
Support for additional protocols for smarthost submission
Previously only the
SMTP protocol was used for
submission of email. Now it is possible to select either
smarthosts with different protocols are defined,
smarthost to use will be selected based on the priorities
SMTP and lastly
Fail over between protocols is not supported.
Improvements to SAML2 intergration
Various improvements have been made to the SAML2 implementation to make it more user friendly.
Improvements to local scores implementation
User interface changes have been made to the local scores implementation to explicitly show which rules have been modified locally as well as which ones have been disabled.
Ensure that in clustered setups you upgrade the backend prior to upgrading your frontend systems. Failure to do this cause cause some mail to get bounced or rejected.
Custom configuration changes
Changes have been made to the salt configuration module for SMTP, If you have customised your salt configuration you need to sync the new changes to your customised module.
If you are using a custom template and do not update your templates you may ran into issues, ensure that you update your templates on upgrade.