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553 sorry, relaying denied without authentication from your location

Starting last night, mails to German hosts versatel.de and foni.net bounced with this message:
host maildo.versatel.de [89.245.133.5]: 553 sorry, relaying denied without authentication from your location [***.***.143.1]. Please check your SMTP-Auth settings. (#5.7.1)

Any suggestions where to look for a solution?
ASG 320 - Firmware version: 9.310-11

Thanks
Jens Jakob
Dansk Centralbibliotek

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0 Jens JakobSorensen over 9 years ago

We are able to deliver mails to the two domains again. Without making any changes at all, so I guess it was an error on their systems.
But I will look into the SPF-stuff in order to prevent future problems.
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0 Jens JakobSorensen over 9 years ago

We are able to deliver mails to the two domains again. Without making any changes at all, so I guess it was an error on their systems.
But I will look into the SPF-stuff in order to prevent future problems.
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