phpmail not working

phpmail in mailpoet 2 worked like a charm
can’t get mailpoet 3 to send on any setting. I get “The email could not be sent: Could not instantiate mail function.” using 1and1

name: Dale
email: [email protected]
PHP version: 7.0.24
MailPoet Free version: 3.0.9
MailPoet Premium version: N/A
MailPoet Premium/MSS key:
WordPress version: 4.8.3
Database version: 5.5.57-0+deb7u1-log
Web server: Apache
Server OS: Linux info 3.0 #1337 SMP Tue Jan 01 00:00:00 CEST 2000 all GNU/Linux
WP_MEMORY_LIMIT: 40M
WP_MAX_MEMORY_LIMIT: 256M
WP_DEBUG: false
PHP max_execution_time: 50000
PHP memory_limit: 256M
PHP upload_max_filesize: 64M
PHP post_max_size: 64M
WordPress language: en_US
Multisite environment?: No
Current Theme: Responsive Mobile (version 1.7)
Active Plugin names: redux-framework/redux-framework.php, advanced-shipping-validation-for-woocommerce/advanced-shipping-validation-for-woocommerce.php, analytics-counter/analytics-counter.php, bbpress/bbpress.php, better-wp-security/better-wp-security.php, captcha-code-authentication/wpCaptcha.php, captcha/captcha.php, display-posts-shortcode/display-posts-shortcode.php, duplicate-post/duplicate-post.php, flexible-checkout-fields/flexible-checkout-fields.php, google-sitemap-generator/sitemap.php, instagram-feed/instagram-feed.php, mailpoet/mailpoet.php, official-statcounter-plugin-for-wordpress/StatCounter-Wordpress-Plugin.php, recipe-card/yumprint-recipe.php, regenerate-thumbnails/regenerate-thumbnails.php, si-contact-form/si-contact-form.php, super-socializer/super_socializer.php, support-ticket-system-by-phoeniixx/phoen_ticket_system.php, the-events-calendar/the-events-calendar.php, woocommerce-custom-options-lite/plugin.php, woocommerce-delivery-notes/woocommerce-delivery-notes.php, woocommerce-sequential-order-numbers/woocommerce-sequential-order-numbers.php, woocommerce-square/woocommerce-square.php, woocommerce-weight-country-based-shipping/woocommerce-wc-shipping.php, woocommerce/woocommerce.php, wp-all-import/plugin.php, wp-edit/main.php, wysija-newsletters/index.php
Sending Method: SMTP
Sending Frequency: 70 emails every 15 minutes
Task Scheduler method: WordPress
Cron ping URL: https://www.summerfieldherbfarm.com?mailpoet_router&endpoint=cron_daemon&action=ping
Default FROM address: [email protected]
Default Reply-To address: [email protected]
Bounce Email Address: [email protected]
Total number of subscribers: 100