i came on to ask exactly the same question.
hope that someone will help us 🙂
tnegulic, check this thread:
http://wordpress.org/support/topic/185889?replies=5
requires modification of core wp files though 🙁
Lots of possibilities out there, you just have to search until you find one you like.
http://wordpress.org/extend/plugins/register-plus/
“Compatible up to: 2.6… …Customized Admin & User Registration Email”
http://wordpress.org/extend/plugins/mail-from/
“Compatible up to: 2.7… …Mail From is WordPress plugin that that allows you to change the default wordpress@example.com email address that WordPress sends it’s email from, and the name of the sender that the email is from. It’s as simple as that.”
http://wordpress.org/search/mail+change++from+?forums=1
ClaytonJames… U the man!
On a different note… does it seem strange to hardcode something like this into WP’s core files?
when i was searching for help i found lots of people trying to change it.
I’ve tried both suggestions by ClaytonJames and am still getting the same error. ANy ideas?