Port check for IPv4:
212.227.17.20
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Internet Protocol Address:
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port
Description
Status (query time)
25
Simple Mail Transfer Protocol (SMTP), used for e-mail routing between mail servers
close (57 ms)
587
e-mail message submission (SMTP)
close (57 ms)
143
Internet Message Access Protocol (IMAP), management of email messages
close (2001 ms)