Just treating mail.ru like any other mail provider should be fine. Theres never any danger is sending mail to an address; its only mail thats received thats an issue. As has been said, dont open any attachments or click any links, and youll be fine.
Is Mail.ru a legitimate email?
The mail domain mail.ru is valid, has proper DNS MX records (mxs.mail.ru), and is able to accept new email. Mail.ru is a popular email service commonly used for personal account creation.
What country is Mail.ru from?
Russia Mail.ru Group (MAIL, listed since November 5, 2010) is the largest internet business in Russia in terms of total daily audience (Mediascope Web Index Desktop+Mobile, Russia 0+, population aged 12-64, September 2019). Mail.ru Group is developing the leading domestic internet communications and entertainment platform.
What is Mail.ru used for?
100 million Cloud Mail.ru is a service allowing users to store files in the cloud synchronized with their devices, view such files and share them on the Internet. Cloud Mail.ru applications are available for all popular mobile (Android, iOS) and desktop (Windows, MacOS) platforms.