If you change your email password, you will need to change your smtp email settings.
For Easy SMTP
1.) Login into the wordpress control panel
2.) Click on settings
3.) Click on Easy WP SMTP
4.) Scroll down to "SMTP Password"
5.) We recommend at least a 16-digit password using a mixture of Letters, Capital Letter, Special Characters and numbers. (never use real words, names or dictionary words) security is everything.
6.) Scroll up to the top of your screen and click on Test Email
7.) Enter you email address and click on the "test email" button
8.) After reviewing the results and if you are successful please test all your webforms and anything else that uses an smtp server on your website.