Sending process fails immediately for domain .online

Hi there,
I using your plugin for some different domains.
For the .today domain plugin is working fine.
But for .online domain test sending process immediately fails with ‘Invalid “From” e-mail address “[email protected]”.
Please advise, how to fix it?

OS: Linux ecbiz172.inmotionhosting.com 2.6.32-504.23.4.el6.x86_64 #1 SMP Tue Jun 9 20:57:37 UTC 2015 x86_64
PHP: Linux 7.1.7 C
PHP Dependencies: iconv=Yes, spl_autoload=Yes, openssl=Yes, sockets=Yes, allow_url_fopen=Yes, mcrypt=Yes, zlib_encode=Yes
WordPress: 4.8 ru_RU UTF-8
WordPress Theme: Divi
WordPress Plugins: Divi Booster, Duplicate Post, Google XML Sitemaps, Gwolle Guestbook, kk Star Ratings, Loginizer, Post Types Order, Postman SMTP, TinyMCE Advanced, UpdraftPlus – Backup/Restore, Yoast SEO
WordPress wp_mail Filter(s): wp_staticize_emoji_for_email
Postman: 1.7.2
Postman Sender Domain (Envelope|Message): just-english.online | just-english.online
Postman Prevent Message Sender Override (Email|Name): No | No
Postman Active Transport: SMTP (smtp:tls:plain://secure172.inmotionhosting.com:587)
Postman Active Transport Status (Ready|Connected): Yes | Yes
Postman Deliveries (Success|Fail): 0 | 1
Postman Stealth Mode: Yes

• This topic was modified 7 years, 7 months ago by AlexeyNN.
• This topic was modified 7 years, 7 months ago by AlexeyNN.