I am experiencing a strange issue:
when a user send an email to an external address that have multiple SMTP servers and so MS Records, when the first MX fails with "connect error 10061", seems that SmarterMail 15 latest version is unable to try the secondary MX and so on.
I've already verified that the DNS is working correctrly (i use 18.104.22.168 and 22.214.171.124 in SmarterMail config).
For example, domain "dmelettronica.it" have that issue with SmarterMail.
Using other server (Mailenable and Kerio) it works correctly.
Excuse me for my bad English!!!