Can not export files to domain. fail 550? 
Autor: Viktor A.
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Can not export files to domain. fail 550?
Best regards Viktor
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At the moment there are many posts regarding this issue
Is one.com your ISP?
Autor
Yes, one.com
Hello!
Useful? ... Seen on another post:
"On the advice of the technicians from one.com, I have now changed the server type from FTP to SFTP with the associated parameters, then created a new password and the problem was then solved.
Now everything works as usual again."
https://helpcenter.websitex5.com/es/post/253466
Or this one? see the intervention of Stefano (Inco):
https://helpcenter.websitex5.com/es/post/253464
Good luck,
J.P.