(reason: 550 126.96.36.199 is not allowed to send mail from sunnyside4.org)
I have several people that I used to be able to email. Now their email is kicked back with the above error 550. Every time I try it shows a different ip address . I understand I need to adjust my spf to fix this but all that I read on the subject shows adjusting the spf to one particular ip not a range that network solutions owns. Any suggestions ?