When comparing 10 Minute Mail vs 33Mail, the Slant community recommends 10 Minute Mail for most people. In the question“What are the best temporary email address services?” 10 Minute Mail is ranked 4th while 33Mail is ranked 21st. The most important reason people chose 10 Minute Mail is:
Each 10 Minute Mail address lasts 10 minutes, then is deleted. Before expiring, it can be refreshed to 10 minute duration if needed.
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Pros
Pro Literal throwaway, gone after use
Each 10 Minute Mail address lasts 10 minutes, then is deleted. Before expiring, it can be refreshed to 10 minute duration if needed.
Pro No need to register
10 Minute Mail does need to be registered on to use its service.
Pro Accepts mail from blacklisted sources
Blacklists are a common anti-spam tactic, but despite careful curation they can have false positives that prevent valid mail from getting through. Mail from blacklisted servers is simply rejected, and won't even show up in a spam filter. 10 Minute Mail has no blacklist, and accepts mail from all sources.
Pro Can be turned into a permanent email adress
Pro Anonymous replies
You can reply to emails via 33mail without disclosing your real email address.
Pro Permanent email aliases
Email aliases aren't temporary, but they can be blocked.
Pro It's been around a while so it ain't going anywhere
33Mail started in 2011 and has been growing steadily since then, forwarding over 1m emails per month as of 2018.
Pro Your own email domain
With 33Mail you get your own domain, like dogbert.33mail.com - and you can create as many aliases as you want under this, such as slant@dogbert.33mail.com. That's with the free plan, but with the paid plan you can use your own domain name.
Cons
Con Only lasts 10 minutes
Sometimes subscription verification emails take longer to arrive.
Con Terrible customer service, no way to stop charges if you sign up for premium
After 1 year they auto-charged for the 2nd year. There is NOWHERE on their site to remove your credit card info. You can write to them them in advance several times to please stop your premium service, but they will charge you anyway. Terrible customer service.