Load 2 shaping.toml file

I cannot tell for sure because you redacted them.

yes domain are identical but creds are different

previously it’s was working fine

And how was KumoMTA supposed to know which one to use?

the sending domain is different

destination is having domain based smtp credentials which i am using

But you have one domain configured for both sets of credentials in the shaping.toml files?

And the shaping.toml files apply based on receiving domain, so when you load two files with the same domain listed, one overwrites the other.

And I previously told you that for that to work you’d have to configure each instance of the rule based on a combination of egress_source and destination domain, but your pasted configs don’t show that change having been made.

ok