Error message when emailing payslips.

Hi There,

I hope you can help. We have 21 employees and  email payslips once a fortnight. Over the last few months when emailing payslips, my first 15-17 process normally, but I then get an error message saying: "Email unable to be sent. Only 17 of 21 emails sent. Outlook appears to be busy or performing another function. Please try again."

I am then able to push the remaining emails through one at a time, but annoyingly, all of the e mails remain in the emails to be sent screen, so I then have to manually go and change them all indiidually to having been sent.

This problem has only developed over the last few months and is consistent with every pay run performed.

Thanks,

Rob.