SMTP Server returned error code 554. Email will not be sentIssue When custom SMTP email account is used outbound emails are not getting sent.ReleaseALLCauseFrom the node logs.2020-03-23 01:57:09 (050) worker.1 worker.1 txid=7f1f6790db7f WARNING *** WARNING *** handling smtp exception: com.sun.mail.smtp.SMTPSendFailedException: 554 5.2.0 STOREDRV.Submission.Exception:SendAsDeniedException.MapiExceptionSendAsDenied; Failed to process message due to a permanent exception with message Cannot submit message. 2020-03-23 01:57:09 (050) worker.1 worker.1 txid=7f1f6790db7f WARNING *** WARNING *** email.78feef50db7f401003dfb3b4f39619a2: SMTP Server returned error code 554. Email will not be sent.Email account "Test Connection" is successful.* Email Accounts "From" address will takes precedence over the User name field.If nothing is present in this field, the User name is used as the return address for notifications sent from the instance.ResolutionRemoving "From" address from the email account will fix this issue.Related Linkshttps://docs.servicenow.com/csh?topicname=t_ConfigureAnEmailAccount.html&version=latest