errors---Send Email To Customers

[peter888]

hi,

 

when I click send email from admin/tools, getting the following error message:

 

"

Fatal error: Allowed memory size of 8388608 bytes exhausted (tried to allocate 38 bytes) in /home/mobook/public_html/admin/mail.php on line 169

"

 

any one knows how to fix the problem. I am waitting for the answer online. Many thankssss