• Currently I still use phabricator, (I don't know where to ask since phabricator is no longer actively maintained)
• Until yesterday, email notification is working properly and successfully sent a notification
  
• But today, email message is queued and shows SMTP Error: Data not accepted. I have googled, and get this error typically indicates that the "From" email address does not match the SMTP username.
• The fact is I didn't change any setting on local.json.
• Maybe I need to reset the config so that the "From" email address does match the SMTP username. Any idea how to do this?
• Or maybe another solutions?

Please enlighten me. Thank you.