Did you send the email to a hotmail or other web-based email account? (as in you dont require a client like MS OE or Mozilla TB) If you did then the receipt request may become obsolete - not all web-based email accounts support them as far as I know
Hands-on: Acer Predator Triton 700 review
D&AD Awards 2017: see the best design, advertising, illustration, animation and VR of the past year
How to lose weight with an Apple Watch
Synology invites you to visit them at Insomnia on 26th – 29th August. Book your tickets now and visit Synology.