ContributionsMost RecentMost LikesSolutionsRe: Cannot send e mails. Keep Getting CXSNDR errors Am able to send/receive through the Cox webmail. Just not through my eM Client app. All is up to date, resetting/rebooting has not helped. Cannot send e mails. Keep Getting CXSNDR errors For a number of days now I haven't been able to send any e mails out. I get the error messages with the error code AUP#CXSNDR. Called Cox twice. Cut off the first time, second time gave several suggestions which didn't help, and finally suggested that I sign up for their Customer Care program for an extra $10/month. It worked fine until 2 weeks ago.