I'm having difficulties figuring out exactly why this particular email address has stopped working. The domain is hosted by HostGator, but the associated email account is hosted by Google.This is the error message received when trying to send an email to the email address in question:This is the mail system at host gateway.websitewelcome.com.I'm sorry to have to inform you that your message could not be  delivered to one or more recipients. It's attached below.For further assistance, please send mail to postmaster.If you do so, please include this problem report. You can delete your  own text from the attached returned message.              The mail system<###@###.com>: host  ASPMX.L.GOOGLE.com[173.194.77.27]    said: 550-5.1.1 The email account  that you tried to reach does not exist.    Please try 550-5.1.1  double-checking the recipient's email address for    typos or  550-5.1.1 unnecessary spaces. Learn more at 550 5.1.1http://support.google.com/mail/bin/answer.py?answer=6596  r10si31186012oef.53 - gsmtp (in reply to RCPT TO command)  Reporting-MTA: dns; gateway.websitewelcome.com X-Postfix-Queue-ID:  E5A2529629D6 X-Postfix-Sender: rfc822; alex@frshstudio.com  Arrival-Date: Sat,  9 Feb 2013 18:34:21 -0600 (CST)Final-Recipient: rfc822; ###@###.com Action:  failed Status: 5.1.1 Remote-MTA: dns; ASPMX.L.GOOGLE.com  Diagnostic-Code: smtp; 550-5.1.1 The email account that you tried to  reach does    not exist. Please try 550-5.1.1 double-checking the  recipient's email    address for typos or 550-5.1.1 unnecessary  spaces. Learn more at 550 5.1.1http://support.google.com/mail/bin/answer.py?answer=6596  r10si31186012oef.53 - gsmtpAny ideas what could be causing this and how to fix it?The support page given by Google indicates that there are typos in the address, and I cannot find any.ETA: HostGator tech support indicated that perhaps there is something going on with the WISE server, but I have not idea how to follow up on this.
Google host email failure - diagnostic code smtp; 550-5.1.1
gmail;google apps;google apps email