error code 535.7.0.5 auth

[keving9]

trying to send payslips through email system coming up with error code 535.7.0.5 auth too many attemps and contact email provider to clear 

[Mark39]

You would need to speak directly to Sky. However I doubt they'll be able or willing to help, not least because 'payslips' implies use for business purposes which Sky Yahoo Mail specifically excludes.