[Core] correct redirecting of mails for the testing environment
[Core] correct redirecting of mails for the testing environment

(#5760, gh-88)

kilip/YAWIK,kilip/YAWIK,kilip/YAWIK,kilip/YAWIK,cross-solution/YAWIK,cross-solution/YAWIK,cross-solution/YAWIK,cross-solution/YAWIK