{"id":5991,"date":"2022-03-17T14:52:00","date_gmt":"2022-03-17T07:52:00","guid":{"rendered":"https:\/\/hostify.vn\/blog\/?p=5991"},"modified":"2022-03-17T14:52:00","modified_gmt":"2022-03-17T07:52:00","slug":"smtp-la-gi-giao-thuc-pop3-imap-va-danh-sach-port","status":"publish","type":"post","link":"https:\/\/www.hostify.vn\/blog\/smtp-la-gi-giao-thuc-pop3-imap-va-danh-sach-port\/","title":{"rendered":"Smtp l\u00e0 g\u00ec? Giao th\u1ee9c POP3, IMAP v\u00e0 danh s\u00e1ch port li\u00ean quan"},"content":{"rendered":"

SMTP l\u00e0 g\u00ec ?<\/h2>\n

SMTP l\u00e0 g\u00ec?<\/strong><\/em> SMTP (vi\u1ebft t\u1eaft c\u1ee7a Simple Mail Transfer Protocol) l\u00e0 giao th\u1ee9c l\u00e0m nhi\u1ec7m v\u1ee5 g\u1eedi hay truy\u1ec1n t\u1ea3i email trong m\u1ea1ng internet. Giao th\u1ee9c n\u00e0y th\u1ef1c hi\u1ec7n nhi\u1ec7m v\u1ee5 ch\u00ednh l\u00e0 g\u1eedi email c\u00f2n vi\u1ec7c nh\u1eadn mail hay truy xu\u1ea5t d\u1eef li\u1ec7u mail server<\/a> s\u1ebd c\u00f3 giao th\u1ee9c IMAP hay POP3 \u0111\u1ea3m nhi\u1ec7m<\/p>\n

Khi doanh nghi\u1ec7p g\u1eedi m\u1ed9t mail n\u00e0o \u0111\u00f3, h\u1ec7 th\u1ed1ng SMTP s\u1ebd t\u1ef1 \u0111\u1ed9ng d\u1ef1a v\u00e0o t\u00ean \u0111\u1ecba ch\u1ec9 email \u0111\u00f3 v\u00e0 chuy\u1ec3n th\u00f4ng b\u00e1o t\u1edbi cho m\u00e1y ch\u1ee7 SMTP. Sau khi SMTP server nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u, t\u00edn hi\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c trao \u0111\u1ed5i gi\u1eefa m\u00e1y ch\u1ee7 SMTP<\/strong> v\u00e0 m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 t\u00ecm ra t\u00ean mi\u1ec1n g\u1ed1c t\u1ea1i Hostname trong m\u00e1y ch\u1ee7 SMTP<\/strong>.<\/p>\n

SMTP ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o ?<\/h3>\n
\"Smtp

SMTP ho\u1ea1t \u0111\u1ed9ng nh\u01b0 th\u1ebf n\u00e0o<\/p><\/div>\n

Khi g\u1eedi email n\u00e0o \u0111\u00f3, h\u1ec7 th\u1ed1ng SMTP s\u1ebd t\u1ef1 \u0111\u1ed9ng d\u1ef1a v\u00e0o t\u00ean \u0111\u1ecba ch\u1ec9 c\u1ee7a email \u0111\u00f3 v\u00e0 chuy\u1ec3n th\u00f4ng b\u00e1o t\u1edbi cho m\u00e1y ch\u1ee7 SMTP.<\/p>\n

Sau khi SMTP server nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u th\u00ec t\u00edn hi\u1ec7u s\u1ebd \u0111\u01b0\u1ee3c trao \u0111\u1ed5i gi\u1eefa m\u00e1y ch\u1ee7 SMTP v\u00e0 m\u00e1y ch\u1ee7 DNS \u0111\u1ec3 t\u00ecm ra t\u00ean mi\u1ec1n g\u1ed1c trong m\u00e1y ch\u1ee7 SMTP.<\/p>\n

Sau nh\u1eefng b\u01b0\u1edbc tr\u00ean, m\u00e1y ch\u1ee7 s\u1ebd th\u1ef1c hi\u1ec7n b\u01b0\u1edbc ki\u1ec3m tra li\u1ec7u th\u00f4ng tin ng\u01b0\u1eddi d\u00f9ng v\u1edbi th\u00f4ng tin email c\u00f3 tr\u00f9ng kh\u1edbp hay kh\u00f4ng? N\u1ebfu tr\u00f9ng kh\u1edbp v\u1edbi nhau th\u00ec doanh nghi\u1ec7p s\u1ebd nh\u1eadn hay g\u1eedi d\u1eef li\u1ec7u c\u00f3 dung l\u01b0\u1ee3ng l\u1edbn th\u00f4ng qua email v\u00e0 nh\u1eadn c\u00e1c th\u01b0 \u0111i\u1ec7n t\u1eed b\u1eb1ng ph\u1ea7n m\u1ec1m.<\/p>\n

\u0110\u1ec3 \u0111\u1ec1 ph\u00f2ng tr\u01b0\u1eddng h\u1ee3p m\u00e1y ch\u1ee7 SMTP<\/a> v\u00e0 m\u00e1y ch\u1ee7 DNS c\u00f3 th\u1ec3 kh\u00f4ng trao \u0111\u1ed5i v\u1edbi nhau th\u00ec nh\u1eefng t\u00edn hi\u1ec7u kh\u00f4ng \u0111\u01b0\u1ee3c ph\u1ea3n h\u1ed3i \u1ea5y s\u1ebd g\u1eedi t\u1edbi server trung gian. Server trung gian v\u1eabn nh\u1eadn \u0111\u01b0\u1ee3c t\u00edn hi\u1ec7u g\u1ed1c v\u00e0 b\u1eaft \u0111\u1ea7u truy\u1ec1n qua nhi\u1ec1u m\u00e1y ch\u1ee7 kh\u00e1c nhau cho t\u1edbi khi g\u1eedi t\u1edbi Server g\u1ed1c.<\/p>\n

H\u1ec7 th\u1ed1ng ph\u1ee5 s\u1ebd ch\u1ea1y h\u1ebft c\u00f4ng su\u1ea5t c\u00f9ng th\u1eddi gian t\u1ed1i \u0111a tr\u01b0\u1edbc khi t\u00edn hi\u1ec7u b\u1ecb th\u00f4ng b\u00e1o l\u00e0 h\u1ebft h\u1ea1n v\u00e0 kh\u00f4ng s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c n\u1eefa.<\/p>\n

C\u00e1c port m\u1eb7c \u0111\u1ecbnh c\u1ee7a SMTP:<\/p>\n