Since then I always name new UTMs with FQDN utm.company.com and create new host records in public and internal DNS zones.
In E-mail protection -> SMTP -> Advanced -> Advanced settings then change the SMTP hostname to mail.company.com for use in HELO commands and SMTP welcome banner.
Since then I always name new UTMs with FQDN utm.company.com and create new host records in public and internal DNS zones.
In E-mail protection -> SMTP -> Advanced -> Advanced settings then change the SMTP hostname to mail.company.com for use in HELO commands and SMTP welcome banner.