Consumers discover a server's supported options by using the EHLO greeting, as exemplified under, instead of the original HELO. Shoppers fall back again to HELO provided that the server will not support EHLO greeting.[24] Kensuke Nagae @kyanny I’ve had a tough time establishing an SMTP server for some testing https://it-support90110.blogdal.com/27149746/not-known-facts-about-mautic