Generic Error when Custom email server is added

I am also having this issue.. but instead when i set up the ustom email config for AWS SES i cant log into central at all. not sure if there is anythign that im doing wrong there.

im changing the standard mail config from:

"email": {
"serviceAccount": "no-reply@${DOMAIN}",
"transport": "smtp",
"transportOpts": {
"host": "mail",
"port": 25
}

to:

"email": {
"serviceAccount": "no-reply@mydomain",
"transport": "smtp",
"transportOpts": {
"host": "email-smtp.us-east-1.amazonaws.com",
"port": 465,
"secure": true,
"auth": {
"user": "user",
"pass": "pass"
}
}
}