Senario:
External Customer emails xyz@mydomain.com and gets a bounce back message below...
Remote-MTA: dns; mydomain.com
Diagnostic-Code: smtp; 550-trans.963.net [202.xxx.xxx.66] is currently not
permitted to relay through 550-this server. Perhaps you have not logged
into the pop/imap server in the 550-last 30 minutes or do not have SMTP
Authentication turned on in your email 550 client.
The External Customer does not receive this bounce back message from everyone at mydomain.com. So the External customer will send an email to xyz@mydomain.com and get the error message. They will then send an email to abc@mydomain.com without any issues.
This issue happends with people from the same external domain theirdomain.com
This issues seems to only be affecting theirdomain.com and all other external customers are not experiencing this issue.
Any insight on this issue would be greatly appreciated.
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Ultimately they will probably need to contact the people who provide them with an SMTP service. It sounds as if they use a POP3 service so they probably use the SMTP server that the POP3 providers will give to send email (or they will use the SMTP service from their ISP).
They will need to identify which one, and then ask for further help from them.
I have looked into this further and found a link that provides the solution to this issue. It was ultimately a Outgoing SMTP server authentication issue on there end.
http://support.bluetie.com
Thanks for the advice!
Business Accounts
Answer for Membership
by: shauncroucherPosted on 2009-06-15 at 10:02:16ID: 24630735
It seems to be that your External customer is having problems with their SMTP service?
Only they have the issue and it is intermittant.
Everyone else does not have problems sending mail to your domain.
the error indicates that whatever service they are using to send email, they are experiencing auhentication issues. Some SMTP servers will allow mail to be sent from a client if they have POP collected mail from the server. It's not a very neat and reliable way of supplying an email service but it still exists. It seems from the information you have given that this external customer is using that service.
Id say without further information available that this is not an issue on your system.