- In principle, there is the possibility of directly "asking" a mail server whether a
E-mail address exists or not. Unfortunately, the servers usually do not allow requests from dynamic IPs.
For example, almost everyone who dials in via DSL has a dynamic IP.
Only real dedicated lines have fixed IPs. Therefore the existence in the email grabber cannot be checked at the moment.
With the free tool Croque-Mort you can be quite reliable
Query e-mail lists for their existence.
You can download the tool from toolsandmore.de.
- There are now some online services that specialize in the validation of email addresses
Has. You buy
there usually volume packages, so ultimately pays per requested email address.
- There is also the case that a mail server reports that an e-mail address exists, which accepts
Server every imaginable
Address of the domain in question, a so-called catch-all.
- On the other hand, it happens quite often that a server does not want to tell whether an address is
exists, this is then to be treated as non-existent.
- Conclusion: if you want to validate your address list, you definitely have to
write off a percentage due to failed tests.
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