Problems while sending e-mails with outlook

[mirko]

If you can, then send the emails with help of the smtp server, this is the only one solving.

[Florida]

I am using the professional version of supermail and using the option \"Send by Microsoft Outlook\".
However, while the software is sending out the e-mails I can not use my computer (for instance it is impossible to work on something else, the computer literally goes crazy) until the supermailer software has finished sending out the e-mails. This is of course very inefficient. Do you have any idea how to fix this problem?
Thanks :d_niemals: