Sendmail error prevents me from sending email

[Curvins.com]

Hello!

I haven't changed anything, but this morning when I tried to send email using squirrelmail, I get an error at the top of the page:

Email delivery error
Server replied: 8 Can't execute command '/usr/local/cpanel/bin/sendmail_cpanel -i -t -fuser@mydomain.com'.

My guess is the space between the -f and username doesn't exist, but I really have no idea since I haven't changed anything.

Thoughts?

Thanks!

-Chad

[thomasw98]

try changing from port 25 to port 26. this solved it for me.