I am using mailgun.net
now it is saying my credentials are not correct
OS: Linux ded.abibitumikasa.com 3.10.0-714.10.2.lve1.4.74.el7.x86_64 #1 SMP Wed Oct 11 15:51:10 EDT 2017 x86_64
PHP: Linux 7.0.26 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=Yes, zlib_encode=Yes
WordPress: 4.9.1 en_US UTF-8
WordPress Theme: Emmet Lite
WordPress Plugins: WC4BP -> WooCommerce BuddyPress Integration, Activity Reactions For Buddypress, Admin Custom Login, Akismet Anti-Spam, iThemes Security, BuddyPress Automatic Friends, BP Better Messages, Desktop Notification, BuddyPress Edit Activity, rtMedia for WordPress, BuddyPress and bbPress, BuddyPress Members only, BuddyPress, YouTube Hub, iFlyChat, Invite Anyone, LearnPress – BuddyPress Integration, LearnPress, Menu Icons, MotoPress Content Editor Lite, Emmet Theme Engine, Nested Comments Unbound, Post SMTP, Recurring PayPal Donations, Rss Post Importer, SendPress Newsletters, Sliced Invoices, The Events Calendar, UpdraftPlus – Backup/Restore, WooCommerce Dropbox, WooCommerce Stripe Gateway, WooCommerce, WordApp – WordPress to Mobile App plugin for WooCommerce & BuddyPress, WP reCaptcha Integration, wpForo – Forums, YouTube
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email
Postman: 1.8
Postman Sender Domain (Envelope|Message): abibitumi.com | abibitumi.com
Postman Prevent Message Sender Override (Email|Name): Yes | Yes
Postman Active Transport: Mailgun API (https://api.mailgun.net:443)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 11 | 1