TempMailGen is described as 'The best temp mail generator. Get unlimited temporary email inboxes for lifetime access. We never delete any old tempmails that you received and we support reply and forward feature for your temp email inboxes' and is an app in the Office & Productivity category. There are more than 50 alternatives to TempMailGen for a variety of platforms, including Online / Web-based, Windows, Linux, iPhone and Firefox. The best alternative is MailDrop, which is both free and Open Source. Other great apps like TempMailGen are Spamgourmet (Free, Open Source), 10 Minute Mail (Free), Burner Mail (Freemium) and Mailinator (Freemium).
Rain Mail is free temporary email service, you can create a free temp email address to use for registrations on social media or newsletters etc. addresses are valid forever but are public and emails are deleted after 24 hours.
FakeMail is a free temporary email address generator and throwaway email service provider offering temporary, secure, anonymous, free, disposable email addresses where you can receive email temporarily but self-destructs after a certain time.
Minute Mailbox is a temporary email service that allows you to generate email IDs and receive emails right the way. You can get your temporary addresses for free with a click of the mouse and let them self-destruct after 24 hours.