SMTPMailer: Did not receive expected 250 (2)

[ctgraham]

Is this same question already is discussion here?

Unable to send and receive email after domain name change

Hello, I am using ojs2.4.8, at first I was using a temporary secondary domain name used to release my system, my email is can use at that time, recently I applied for a new domain name has effect, so I will be a new domain name to a temporary domain name address before, but has been unable to receive mail, I want to know where is wrong, if possible I hope you can tell me how to test the backstage function code, for example, what I need in the navigation bar to show the test results, If you can,…