Based on our record, Expresso should be more popular than MailDrop. It has been mentiond 2 times since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.
Working in PowerShell (.Net regex) one of my favorite tools is https://ultrapico.com/expresso.htm. It does require registering for a free license but it's well worth it. Source: about 2 years ago
Then you need this or something like it: https://ultrapico.com/expresso.htm. Source: about 2 years ago
I did also briefly try https://heluna.com/ as it has a pricing modal that works for my use case and it has a nicer UI than mxguarddog. However I wasn't impressed that Heluna doesn't allow for delivering email on a non standard port to my mail server and they don't specify the source IPs they use to deliver mail to me so I can lock down my perimeter firewall to just those IPs. Both of these things mxguarddog allows... Source: about 2 years ago
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regular expressions 101 - Extensive regex tester and debugger with highlighting for PHP, PCRE, Python and JavaScript.
Mailinator - Any Inbox. Any Time.