fix: harden mailer transport selection and fallbacks - #1402

fix: harden mailer transport selection and fallbacks#1402

kaizercodes wants to merge 4 commits into

CalloraOrg:mainCalloraOrg/Callora-Backend:mainfrom

kaizercodes:security/issue-1295-test-mailer-transport-selection-and-fallbackskaizercodes/Callora-Backend:security/issue-1295-test-mailer-transport-selection-and-fallbacksCopy head branch name to clipboard