I configured Apache James server in my local machine then added domains & user and then configured it in thunderbird.
Then I tried to send an email from Gmail to apache James server and I am facing below issue like, Sometimes mail sent successfully from Gmail to the James server, but sometimes it's failed to send an email.
I am getting this error in Gmail: Address not found Your message wasn't delivered to [email address] because the address couldn't be found, or is unable to receive mail. The response from the remote server was: 550 5.1.1 [email address] Recipient not found.
Anyone please help me on this issue? Thanks!