net.toolkit
http://clez.net/
net
+
.app
.block
.dns
.ping
.ssl
.tcp
.traceroute
.whois
string
+
.enc
.guid
.hash
.ip
.passwd
.sum
list
+
.mac
.port
mail
+
.rbl
.relay
.surbl
.vrfy
web
+
.agent
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mail.vrfy
Test if an email address could receive messages.
smtp
smtps
all mx
info
vrfy result
what's this?
some simple checks weather an E-Mail address exists or not without sending a validation link.