Q: Password changed on laptop. Can receive mail on iPad and iPhone but not send

Hi there cookham15,

Welcome to Apple Support Communities.

If I understand correctly, there's an issue sending emails from the Mail app on your iOS devices. Take a look at the article below which provides a lot of great troubleshooting suggestions that will resolve most issues related to sending email on iOS devices.

Get help with Mail on iPhone, iPad, and iPod touch - Apple Support

Take care.