The 8-digit verification code to identify emailed to our email addresses (<user>@onmarc.nl ) are sometimes delayed for a couple of hours. We use the atlassian login account to login in to a support system of our partner Celebrus. sometimes we receive the 8-digit verification code in a minute and sometimes after a few hours. We see no other issues with our mail system.
used URL:
"https://id.atlassian.com/step-up/start?continue=https%3A%2F%2Fcustomer.support.celebrus.com%2Fhelpcenter%2FCCS%......#sent"
Verify your identity - Log in with Atlassian account