SBCGlobal.net outgoing mail server: smtp.att.yahoo.com (requires authentication)
AT&T ATT outgoing mail server: smtp.att.yahoo.com (requires authentication)
Yahoo! outgoing mail server: smtp.mail.yahoo.com
Verizon outgoing mail server: outgoing.verizon.net
Verizon WIRELESS outgoing mail server: smtp.vzwmail.net
GoDaddy outgoing mail server: use your ISP’s SMTP mail server
Cox Central outgoing mail server: smtp.central.cox.net
Cox East outgoing mail server: smtp.east.cox.net
Cox West outgoing mail server: smtp.west.cox.net
or
Cox outgoing mail server: smtp.coxmail.com
Port: 25
*Note: Requires Authentication