On Wed, Jan 09, 2019 at 07:51:11AM +0000, Yang, Shunyong wrote: > Hi, Vinod, > Thanks for your information. I will check with our IT. > Shunyong. The usual answer is generally over-enthuastic application of anti-SPAM techniques, especially DMARC, which is fundamentally mailing-list hostile. Cheers, - Ted
