...
Note:-
Go to M3 control panel and register your email address, then fill to SMTP form
For Linode user, SMTP restrictions are in place by default for Linodes on accounts created after November 5th 2019. You'll need to configure rDNS for your instance and open a Support ticket confirming CAN-SPAM compliance, and Support should lift the restrictions pretty quickly. Check here for more details
8. Banners and Logo sizes:
Logo: 362 x 63 (4:1)
Favicon: 75 x 75 (1:1)
Signup Placeholder: 600 x 600
Home page banner : 1600 x 400 pixels
Footer banner : 300 x 300 pixels
Video Detail Page banner : 300 x 300 pixels
Under Trending banner : 1500 x 300 pixels
Under New Video banner : 1500 x 300 pixels
Under Video Player banner : 1500 x 300 pixels