ios7 does not delete old pop server

My company has recently changed servers for our email accounts. I have deleted the old account and SMTP server from my iphone. I added the new pop account with the new server and have SSL activated. I can receive email just fine. However, when I try to send or reply to an email a message comes up that says "Cannot Send Mail, The user name or password for "old server" is incorrect". This "old server" was deleted, so when trying to access the settings option on this message, it takes me to the new account. Checking the SMTP server the name is correct, as this SMTP account is on as the primary server. Why will ios7 not accept the new server name, and why is it trying to use the "old server" name as the SMTP outging server?