The posting revealed that the foundation is seeing 3.3 million POP3 email hosts and a similar number of IMAP email hosts, although there is a large amount of overlap between the two. Transport ...
DNS 53 Find IP address SMTP 25 Internet mail POP3 110 POP mailbox IMAP 143 IMAP mailbox Telnet 23 Remote login SSH 22 Remote login (secure) NNTP 119 Usenet newsgroups NNTPS 563 Usenet (secure ...
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