Validate email really exists

This is one of the "holy grail" goals for we coders. Sadly, there is no "easy" way to do this.

So, you can do it the hard way. This PDF contains a lot of information about the process and how to implement it. It also contains some VERY VALID WARNINGS about what consequences you can expect if you do too much. DO read it through:

https://assets.hubexchange.com/towerdata...dation.pdf

NOTE that there are a huge number of commercial services which provide this utility. That should tell you that it is complex enough to make it easier to pay for third party verification than to write your own. Yes, you can write your own utility, but there is significant overhead to your system and you (or your client) must be willing to accept the task of administrating the email validation system...

Disclaimer, I do not operate such a verification system and am not affiliated with any such systems.

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