{"id":476941,"date":"2023-08-09T09:05:36","date_gmt":"2023-08-09T09:05:36","guid":{"rendered":""},"modified":"2023-09-05T11:13:44","modified_gmt":"2023-09-05T11:13:44","slug":"dns-spf-record","status":"publish","type":"wiki","link":"https:\/\/oneproxy.pro\/vn\/wiki\/dns-spf-record\/","title":{"rendered":"B\u1ea3n ghi DNS SPF"},"content":{"rendered":"<p>B\u1ea3n ghi DNS SPF \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong l\u0129nh v\u1ef1c li\u00ean l\u1ea1c qua email v\u00e0 an ninh m\u1ea1ng. Vi\u1ebft t\u1eaft c\u1ee7a \u201cKhung ch\u00ednh s\u00e1ch ng\u01b0\u1eddi g\u1eedi h\u1ec7 th\u1ed1ng t\u00ean mi\u1ec1n\u201d, b\u1ea3n ghi DNS SPF l\u00e0 c\u00f4ng c\u1ee5 quan tr\u1ecdng \u0111\u1ec3 ch\u1ed1ng l\u1ea1i c\u00e1c n\u1ed7 l\u1ef1c spam v\u00e0 l\u1eeba \u0111\u1ea3o. Ch\u00fang \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 gi\u00fap c\u00e1c m\u00e1y ch\u1ee7 th\u01b0 ph\u00e2n bi\u1ec7t gi\u1eefa email h\u1ee3p ph\u00e1p v\u00e0 email \u0111\u1ed9c h\u1ea1i. Hi\u1ec3u b\u1ea3n ghi DNS SPF l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ed1i v\u1edbi b\u1ea5t k\u1ef3 ai tham gia qu\u1ea3n l\u00fd m\u00e1y ch\u1ee7 email ho\u1eb7c qu\u1ea3n tr\u1ecb t\u00ean mi\u1ec1n.<\/p>\n<h2>L\u1ecbch s\u1eed c\u1ee7a b\u1ea3n ghi DNS SPF<\/h2>\n<p>B\u1ea3n ghi DNS SPF c\u00f3 ngu\u1ed3n g\u1ed1c l\u00e0 m\u1ed9t ph\u01b0\u01a1ng ph\u00e1p ch\u1ed1ng gi\u1ea3 m\u1ea1o email, m\u1ed9t k\u1ef9 thu\u1eadt th\u01b0\u1eddng \u0111\u01b0\u1ee3c nh\u1eefng k\u1ebb g\u1eedi th\u01b0 r\u00e1c v\u00e0 k\u1ebb l\u1eeba \u0111\u1ea3o s\u1eed d\u1ee5ng. Kh\u00e1i ni\u1ec7m SPF l\u1ea7n \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c \u0111\u1ec1 xu\u1ea5t b\u1edfi Meng Weng Wong v\u00e0o n\u0103m 2003, ng\u01b0\u1eddi \u0111\u00e3 t\u00ecm c\u00e1ch gi\u1ea3i quy\u1ebft v\u1ea5n \u0111\u1ec1 ng\u00e0y c\u00e0ng gia t\u0103ng v\u1ec1 email kh\u00f4ng mong mu\u1ed1n. Trong nh\u1eefng n\u0103m sau \u0111\u00f3, \u00fd t\u01b0\u1edfng ban \u0111\u1ea7u n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c c\u1ea3i ti\u1ebfn, ti\u00eau chu\u1ea9n h\u00f3a v\u00e0 cu\u1ed1i c\u00f9ng \u0111\u01b0\u1ee3c L\u1ef1c l\u01b0\u1ee3ng \u0111\u1eb7c nhi\u1ec7m k\u1ef9 thu\u1eadt Internet (IETF) c\u00f4ng b\u1ed1 d\u01b0\u1edbi d\u1ea1ng RFC 4408 v\u00e0o n\u0103m 2006. Theo th\u1eddi gian, SPF \u0111\u00e3 tr\u1edf th\u00e0nh n\u1ec1n t\u1ea3ng c\u1ee7a c\u00e1c c\u01a1 ch\u1ebf x\u00e1c th\u1ef1c email hi\u1ec7n \u0111\u1ea1i, b\u00ean c\u1ea1nh c\u00e1c c\u00f4ng ngh\u1ec7 nh\u01b0 DKIM v\u00e0 DMARC.<\/p>\n<h2>B\u1ea3n ghi DNS SPF: C\u00e1i nh\u00ecn chuy\u00ean s\u00e2u<\/h2>\n<p>B\u1ea3n ghi DNS SPF v\u1ec1 c\u01a1 b\u1ea3n l\u00e0 b\u1ea3n ghi TXT trong c\u00e0i \u0111\u1eb7t DNS c\u1ee7a mi\u1ec1n ch\u1ec9 \u0111\u1ecbnh m\u00e1y ch\u1ee7 th\u01b0 n\u00e0o \u0111\u01b0\u1ee3c ph\u00e9p g\u1eedi email thay m\u1eb7t cho mi\u1ec1n. N\u00f3 gi\u00fap m\u00e1y ch\u1ee7 c\u1ee7a ng\u01b0\u1eddi nh\u1eadn x\u00e1c minh t\u00ednh x\u00e1c th\u1ef1c c\u1ee7a c\u00e1c email \u0111\u1ebfn b\u1eb1ng c\u00e1ch ki\u1ec3m tra xem ch\u00fang c\u00f3 b\u1eaft ngu\u1ed3n t\u1eeb c\u00e1c m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c ch\u1ee7 s\u1edf h\u1eefu t\u00ean mi\u1ec1n x\u1eed ph\u1ea1t hay kh\u00f4ng.<\/p>\n<p>Khi m\u1ed9t email \u0111\u01b0\u1ee3c g\u1eedi \u0111i, m\u00e1y ch\u1ee7 th\u01b0 nh\u1eadn c\u00f3 th\u1ec3 ki\u1ec3m tra b\u1ea3n ghi SPF c\u1ee7a mi\u1ec1n c\u1ee7a ng\u01b0\u1eddi g\u1eedi. N\u1ebfu \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 g\u1ed1c \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea trong b\u1ea3n ghi SPF th\u00ec email s\u1ebd \u0111\u01b0\u1ee3c x\u00e1c th\u1ef1c. N\u1ebfu kh\u00f4ng, email c\u00f3 th\u1ec3 b\u1ecb \u0111\u00e1nh d\u1ea5u l\u00e0 th\u01b0 r\u00e1c ho\u1eb7c c\u00f3 kh\u1ea3 n\u0103ng nguy hi\u1ec3m.<\/p>\n<h2>C\u1ea5u tr\u00fac b\u00ean trong c\u1ee7a b\u1ea3n ghi DNS SPF<\/h2>\n<p>M\u1ed9t b\u1ea3n ghi SPF bao g\u1ed3m m\u1ed9t s\u1ed1 ph\u1ea7n:<\/p>\n<ul>\n<li>C\u00e1c <code data-no-translation=\"\">v=spf1<\/code> tag: \u0110i\u1ec1u n\u00e0y cho bi\u1ebft b\u1ea3n ghi TXT l\u00e0 b\u1ea3n ghi SPF.<\/li>\n<li>Danh s\u00e1ch \u0111\u1ecba ch\u1ec9 IP ho\u1eb7c mi\u1ec1n \u0111\u01b0\u1ee3c \u1ee7y quy\u1ec1n g\u1eedi email thay m\u1eb7t mi\u1ec1n. Ch\u00fang c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c ch\u1ec9 \u0111\u1ecbnh l\u00e0m \u0111\u1ecba ch\u1ec9 IP ri\u00eang l\u1ebb (nh\u01b0 <code data-no-translation=\"\">ip4:192.0.2.0<\/code> ho\u1eb7c <code data-no-translation=\"\">ip6:2001:db8::<\/code>) ho\u1eb7c t\u00ean mi\u1ec1n (nh\u01b0 <code data-no-translation=\"\">include:example.com<\/code>).<\/li>\n<li>C\u00e1c <code data-no-translation=\"\">all<\/code> c\u01a1 ch\u1ebf: \u0110i\u1ec1u n\u00e0y ch\u1ec9 \u0111\u1ecbnh c\u00e1ch m\u00e1y ch\u1ee7 x\u1eed l\u00fd th\u01b0 t\u1eeb c\u00e1c \u0111\u1ecba ch\u1ec9 IP kh\u00f4ng \u0111\u01b0\u1ee3c li\u1ec7t k\u00ea trong b\u1ea3n ghi SPF. N\u00f3 c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c b\u1eaft \u0111\u1ea7u b\u1eb1ng m\u1ed9t <code data-no-translation=\"\">-<\/code> (th\u1ea5t b\u1ea1i), <code data-no-translation=\"\">~<\/code> (l\u1ed7i m\u1ec1m), <code data-no-translation=\"\">+<\/code> (v\u01b0\u1ee3t qua), ho\u1eb7c <code data-no-translation=\"\">?<\/code> (trung l\u1eadp).<\/li>\n<\/ul>\n<p>V\u00ed d\u1ee5: b\u1ea3n ghi SPF c\u00f3 th\u1ec3 tr\u00f4ng nh\u01b0 th\u1ebf n\u00e0y: <code data-no-translation=\"\">v=spf1 ip4:192.0.2.0 include:example.com ~all<\/code>.<\/p>\n<h2>C\u00e1c t\u00ednh n\u0103ng ch\u00ednh c\u1ee7a b\u1ea3n ghi DNS SPF<\/h2>\n<ul>\n<li><strong>X\u00e1c th\u1ef1c email<\/strong>: B\u1ea3n ghi SPF cho ph\u00e9p m\u00e1y ch\u1ee7 email x\u00e1c th\u1ef1c email \u0111\u1ebfn, gi\u1ea3m thi\u1ec3u c\u00e1c n\u1ed7 l\u1ef1c spam v\u00e0 l\u1eeba \u0111\u1ea3o.<\/li>\n<li><strong>Uy\u1ec3n chuy\u1ec3n<\/strong>: Ch\u00fang cho ph\u00e9p ch\u1ee7 s\u1edf h\u1eefu mi\u1ec1n ch\u1ec9 \u0111\u1ecbnh ch\u00ednh x\u00e1c m\u00e1y ch\u1ee7 n\u00e0o c\u00f3 th\u1ec3 g\u1eedi email thay m\u1eb7t h\u1ecd.<\/li>\n<li><strong>C\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng giao h\u00e0ng<\/strong>: Vi\u1ec7c s\u1eed d\u1ee5ng \u0111\u00fang b\u1ea3n ghi SPF c\u00f3 th\u1ec3 c\u1ea3i thi\u1ec7n kh\u1ea3 n\u0103ng g\u1eedi email b\u1eb1ng c\u00e1ch gi\u1ea3m nguy c\u01a1 email b\u1ecb \u0111\u00e1nh d\u1ea5u l\u00e0 th\u01b0 r\u00e1c.<\/li>\n<li><strong>Th\u1ef1c hi\u1ec7n \u0111\u01a1n gi\u1ea3n<\/strong>: B\u1ea3n ghi SPF r\u1ea5t d\u1ec5 th\u1ef1c hi\u1ec7n, ch\u1ec9 y\u00eau c\u1ea7u b\u1ea3n ghi TXT trong c\u00e0i \u0111\u1eb7t DNS c\u1ee7a mi\u1ec1n.<\/li>\n<\/ul>\n<h2>C\u00e1c lo\u1ea1i c\u01a1 ch\u1ebf ghi DNS SPF<\/h2>\n<p>B\u1ea3n ghi DNS SPF \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb c\u00e1c c\u01a1 ch\u1ebf x\u00e1c \u0111\u1ecbnh c\u00e1ch m\u00e1y ch\u1ee7 nh\u1eadn th\u01b0 s\u1ebd x\u1eed l\u00fd th\u01b0 \u0111\u1ebfn. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 nh\u1eefng c\u00e1i ch\u00ednh:<\/p>\n<table>\n<thead>\n<tr>\n<th>C\u01a1 ch\u1ebf<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td><code data-no-translation=\"\">all<\/code><\/td>\n<td>Ph\u00f9 h\u1ee3p v\u1edbi t\u1ea5t c\u1ea3 c\u00e1c \u0111\u1ecba ch\u1ec9. Ti\u1ec1n t\u1ed1 x\u00e1c \u0111\u1ecbnh ph\u1ea3n h\u1ed3i cho k\u1ebft qu\u1ea3 kh\u1edbp (v\u00ed d\u1ee5: <code data-no-translation=\"\">~all<\/code> \u0111\u1ed1i v\u1edbi l\u1ed7i m\u1ec1m).<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">ip4<\/code><\/td>\n<td>Ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ecba ch\u1ec9 IPv4 ho\u1eb7c m\u1ea1ng con \u0111\u01b0\u1ee3c cung c\u1ea5p.<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">ip6<\/code><\/td>\n<td>Ph\u00f9 h\u1ee3p v\u1edbi \u0111\u1ecba ch\u1ec9 IPv6 ho\u1eb7c m\u1ea1ng con \u0111\u01b0\u1ee3c cung c\u1ea5p.<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">a<\/code><\/td>\n<td>Kh\u1edbp v\u1edbi \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c truy v\u1ea5n DNS A ho\u1eb7c AAAA tr\u1ea3 v\u1ec1.<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">mx<\/code><\/td>\n<td>Kh\u1edbp v\u1edbi \u0111\u1ecba ch\u1ec9 IP \u0111\u01b0\u1ee3c truy v\u1ea5n DNS MX tr\u1ea3 v\u1ec1.<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">ptr<\/code><\/td>\n<td>Kh\u1edbp v\u1edbi t\u00ean m\u00e1y ch\u1ee7 \u0111\u01b0\u1ee3c truy v\u1ea5n DNS PTR tr\u1ea3 v\u1ec1.<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">exists<\/code><\/td>\n<td>Kh\u1edbp n\u1ebfu t\u00ean mi\u1ec1n \u0111\u01b0\u1ee3c cung c\u1ea5p ph\u00e2n gi\u1ea3i th\u00e0nh \u0111\u1ecba ch\u1ec9.<\/td>\n<\/tr>\n<tr>\n<td><code data-no-translation=\"\">include<\/code><\/td>\n<td>Bao g\u1ed3m b\u1ea3n ghi SPF c\u1ee7a t\u00ean mi\u1ec1n kh\u00e1c.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>S\u1eed d\u1ee5ng b\u1ea3n ghi DNS SPF: V\u1ea5n \u0111\u1ec1 v\u00e0 gi\u1ea3i ph\u00e1p<\/h2>\n<p>M\u1ed9t v\u1ea5n \u0111\u1ec1 ph\u1ed5 bi\u1ebfn v\u1edbi b\u1ea3n ghi SPF l\u00e0 gi\u1edbi h\u1ea1n s\u1ed1 l\u01b0\u1ee3ng tra c\u1ee9u DNS. M\u1ed9t b\u1ea3n ghi SPF ch\u1ec9 c\u00f3 th\u1ec3 g\u00e2y ra t\u1ed1i \u0111a 10 l\u1ea7n tra c\u1ee9u DNS, c\u00f3 th\u1ec3 d\u1ec5 d\u00e0ng v\u01b0\u1ee3t qu\u00e1 khi s\u1eed d\u1ee5ng <code data-no-translation=\"\">include<\/code> V\u00e0 <code data-no-translation=\"\">a<\/code> c\u01a1 ch\u1ebf. V\u01b0\u1ee3t qu\u00e1 gi\u1edbi h\u1ea1n n\u00e0y c\u00f3 th\u1ec3 khi\u1ebfn vi\u1ec7c x\u00e1c th\u1ef1c SPF kh\u00f4ng th\u00e0nh c\u00f4ng. \u0110\u1ec3 kh\u1eafc ph\u1ee5c \u0111i\u1ec1u n\u00e0y, b\u1ea1n n\u00ean t\u1ed1i \u01b0u h\u00f3a b\u1ea3n ghi SPF b\u1eb1ng c\u00e1ch gi\u1ea3m s\u1ed1 l\u1ea7n tra c\u1ee9u DNS. S\u1eed d\u1ee5ng \u0111\u1ecba ch\u1ec9 IP (<code data-no-translation=\"\">ip4<\/code> ho\u1eb7c <code data-no-translation=\"\">ip6<\/code>) thay v\u00ec t\u00ean mi\u1ec1n n\u1ebfu c\u00f3 th\u1ec3.<\/p>\n<p>M\u1ed9t v\u1ea5n \u0111\u1ec1 kh\u00e1c ph\u00e1t sinh t\u1eeb vi\u1ec7c s\u1eed d\u1ee5ng d\u1ecbch v\u1ee5 email c\u1ee7a b\u00ean th\u1ee9 ba. N\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ea3n ghi SPF c\u1ee7a b\u1ea1n m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c, c\u00e1c email \u0111\u01b0\u1ee3c g\u1eedi qua c\u00e1c d\u1ecbch v\u1ee5 n\u00e0y c\u00f3 th\u1ec3 b\u1ecb \u0111\u00e1nh d\u1ea5u l\u00e0 th\u01b0 r\u00e1c. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c gi\u1ea3i quy\u1ebft b\u1eb1ng c\u00e1ch th\u00eam ch\u00ednh x\u00e1c c\u00e1c d\u1ecbch v\u1ee5 n\u00e0y v\u00e0o b\u1ea3n ghi SPF c\u1ee7a b\u1ea1n b\u1eb1ng <code data-no-translation=\"\">include<\/code> c\u01a1 ch\u1ebf.<\/p>\n<h2>So s\u00e1nh v\u1edbi c\u00e1c \u0111i\u1ec1u kho\u1ea3n t\u01b0\u01a1ng t\u1ef1<\/h2>\n<p>M\u1eb7c d\u00f9 SPF l\u00e0 m\u1ed9t ph\u1ea7n thi\u1ebft y\u1ebfu c\u1ee7a b\u1ea3o m\u1eadt email nh\u01b0ng \u0111\u00e2y kh\u00f4ng ph\u1ea3i l\u00e0 giao th\u1ee9c duy nh\u1ea5t th\u1ef1c hi\u1ec7n \u0111\u01b0\u1ee3c \u0111i\u1ec1u \u0111\u00f3. D\u01b0\u1edbi \u0111\u00e2y l\u00e0 so s\u00e1nh v\u1edbi c\u00e1c giao th\u1ee9c t\u01b0\u01a1ng t\u1ef1:<\/p>\n<table>\n<thead>\n<tr>\n<th>Thu\u1eadt ng\u1eef<\/th>\n<th>S\u1ef1 mi\u00eau t\u1ea3<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>SPF (Khung ch\u00ednh s\u00e1ch ng\u01b0\u1eddi g\u1eedi)<\/td>\n<td>Ch\u1ec9 \u0111\u1ecbnh m\u00e1y ch\u1ee7 n\u00e0o c\u00f3 th\u1ec3 g\u1eedi th\u01b0 thay m\u1eb7t cho m\u1ed9t mi\u1ec1n.<\/td>\n<\/tr>\n<tr>\n<td>DKIM (Th\u01b0 \u0111\u01b0\u1ee3c x\u00e1c \u0111\u1ecbnh b\u1eb1ng kh\u00f3a mi\u1ec1n)<\/td>\n<td>Th\u00eam ch\u1eef k\u00fd \u0111i\u1ec7n t\u1eed v\u00e0o ti\u00eau \u0111\u1ec1 email m\u00e0 ng\u01b0\u1eddi nh\u1eadn c\u00f3 th\u1ec3 x\u00e1c minh.<\/td>\n<\/tr>\n<tr>\n<td>DMARC (X\u00e1c th\u1ef1c, b\u00e1o c\u00e1o v\u00e0 tu\u00e2n th\u1ee7 th\u01b0 d\u1ef1a tr\u00ean t\u00ean mi\u1ec1n)<\/td>\n<td>\u0110\u01b0\u1ee3c x\u00e2y d\u1ef1ng d\u1ef1a tr\u00ean SPF v\u00e0 DKIM, ch\u1ec9 \u0111\u1ecbnh \u0111i\u1ec1u g\u00ec s\u1ebd x\u1ea3y ra n\u1ebfu email kh\u00f4ng v\u01b0\u1ee3t qua b\u01b0\u1edbc ki\u1ec3m tra SPF ho\u1eb7c DKIM.<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2>Quan \u0111i\u1ec3m v\u00e0 c\u00f4ng ngh\u1ec7 c\u1ee7a t\u01b0\u01a1ng lai li\u00ean quan \u0111\u1ebfn b\u1ea3n ghi DNS SPF<\/h2>\n<p>Kh\u00e1i ni\u1ec7m v\u1ec1 SPF kh\u00f4ng ng\u1eebng ph\u00e1t tri\u1ec3n. Hi\u1ec7n t\u1ea1i, ng\u00e0y c\u00e0ng c\u00f3 nhi\u1ec1u s\u1ef1 h\u1ed7 tr\u1ee3 d\u00e0nh cho BIMI (Ch\u1ec9 s\u1ed1 th\u01b0\u01a1ng hi\u1ec7u \u0111\u1ec3 nh\u1eadn d\u1ea1ng th\u00f4ng b\u00e1o), \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng tr\u00ean SPF, DKIM v\u00e0 DMARC. BIMI cho ph\u00e9p c\u00e1c t\u1ed5 ch\u1ee9c hi\u1ec3n th\u1ecb logo c\u1ee7a h\u1ecd trong h\u1ed9p th\u01b0 \u0111\u1ebfn c\u1ee7a kh\u00e1ch h\u00e0ng, n\u00e2ng cao kh\u1ea3 n\u0103ng hi\u1ec3n th\u1ecb v\u00e0 tin c\u1eady c\u1ee7a th\u01b0\u01a1ng hi\u1ec7u.<\/p>\n<p>H\u01a1n n\u1eefa, v\u1edbi vi\u1ec7c \u00e1p d\u1ee5ng IPv6 ng\u00e0y c\u00e0ng t\u0103ng, c\u1ea7n ph\u1ea3i \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c b\u1ea3n ghi SPF t\u01b0\u01a1ng th\u00edch v\u00e0 s\u1eb5n s\u00e0ng cho c\u00e1c \u0111\u1ecba ch\u1ec9 IPv6.<\/p>\n<h2>B\u1ea3n ghi DNS SPF v\u00e0 m\u00e1y ch\u1ee7 proxy<\/h2>\n<p>M\u00e1y ch\u1ee7 proxy c\u00f3 th\u1ec3 l\u00e0m ph\u1ee9c t\u1ea1p ch\u1ee9c n\u0103ng c\u1ee7a b\u1ea3n ghi SPF n\u1ebfu n\u00f3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 g\u1eedi email. Trong nh\u1eefng tr\u01b0\u1eddng h\u1ee3p nh\u01b0 v\u1eady, \u0111\u1ecba ch\u1ec9 IP c\u1ee7a m\u00e1y ch\u1ee7 proxy ph\u1ea3i \u0111\u01b0\u1ee3c \u0111\u01b0a v\u00e0o b\u1ea3n ghi SPF \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o g\u1eedi email th\u00e0nh c\u00f4ng. N\u1ebfu kh\u00f4ng, c\u00e1c email \u0111\u01b0\u1ee3c g\u1eedi qua proxy c\u00f3 th\u1ec3 kh\u00f4ng v\u01b0\u1ee3t qua b\u01b0\u1edbc ki\u1ec3m tra SPF v\u00e0 c\u00f3 th\u1ec3 b\u1ecb \u0111\u00e1nh d\u1ea5u l\u00e0 th\u01b0 r\u00e1c.<\/p>\n<p>C\u00e1c nh\u00e0 cung c\u1ea5p m\u00e1y ch\u1ee7 proxy nh\u01b0 OneProxy c\u00f3 th\u1ec3 h\u1ed7 tr\u1ee3 tri\u1ec3n khai b\u1ea3n ghi SPF b\u1eb1ng c\u00e1ch cung c\u1ea5p \u0111\u1ecba ch\u1ec9 IP t\u0129nh v\u00e0 nh\u1ea5t qu\u00e1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong b\u1ea3n ghi SPF c\u1ee7a mi\u1ec1n.<\/p>\n<h2>Li\u00ean k\u1ebft li\u00ean quan<\/h2>\n<p>\u0110\u1ec3 bi\u1ebft th\u00eam th\u00f4ng tin v\u1ec1 b\u1ea3n ghi DNS SPF, h\u00e3y ki\u1ec3m tra c\u00e1c t\u00e0i nguy\u00ean sau:<\/p>\n<ul>\n<li><a href=\"http:\/\/www.openspf.org\/Project_Overview\" target=\"_new\" rel=\"noopener nofollow\">T\u1ed5ng quan v\u1ec1 d\u1ef1 \u00e1n SPF<\/a><\/li>\n<li><a href=\"https:\/\/sendgrid.com\/blog\/understanding-spf-and-dkim\/\" target=\"_new\" rel=\"noopener nofollow\">Hi\u1ec3u SPF v\u00e0 DKIM<\/a><\/li>\n<li><a href=\"https:\/\/dmarcly.com\/blog\/spf-syntax-table\" target=\"_new\" rel=\"noopener nofollow\">B\u1ea3ng c\u00fa ph\u00e1p SPF<\/a><\/li>\n<li><a href=\"https:\/\/tools.ietf.org\/html\/rfc7208\" target=\"_new\" rel=\"noopener nofollow\">IETF RFC 7208 \u2013 Khung ch\u00ednh s\u00e1ch ng\u01b0\u1eddi g\u1eedi (SPF) \u0111\u1ec3 c\u1ea5p ph\u00e9p s\u1eed d\u1ee5ng t\u00ean mi\u1ec1n trong email<\/a><\/li>\n<\/ul>","protected":false},"featured_media":476942,"menu_order":0,"template":"","meta":{"_acf_changed":false,"content-type":"","inline_featured_image":false,"footnotes":""},"class_list":["post-476941","wiki","type-wiki","status-publish","has-post-thumbnail","hentry"],"acf":{"faq_title":"Frequently Asked Questions about <mark>The Comprehensive Guide to DNS SPF Records<\/mark>","faq_items":[{"question":"What is a DNS SPF record?","answer":"<p>A DNS SPF record is a TXT record in a domain's DNS settings that specifies which mail servers are allowed to send emails on behalf of the domain. It's a vital tool in email communications and cybersecurity to help mail servers differentiate between legitimate and malicious emails.<\/p>"},{"question":"When was the DNS SPF record first proposed and by whom?","answer":"<p>The concept of SPF was first proposed by Meng Weng Wong in 2003 to combat the growing issue of unsolicited emails. It was standardized and published as RFC 4408 by the Internet Engineering Task Force (IETF) in 2006.<\/p>"},{"question":"How does a DNS SPF record work?","answer":"<p>When an email is sent, the receiving mail server checks the SPF record of the sender's domain. If the IP address of the originating server is listed in the SPF record, the email is authenticated. If not, the email can be marked as spam or potentially dangerous.<\/p>"},{"question":"What is the structure of a DNS SPF record?","answer":"<p>An SPF record includes a tag indicating that it's an SPF record (<code>v=spf1<\/code>), a list of authorized IP addresses or domains, and an <code>all<\/code> mechanism specifying how to handle mail from IP addresses not listed in the SPF record.<\/p>"},{"question":"What are the key features of DNS SPF records?","answer":"<p>The key features of DNS SPF records include verifying email authenticity, providing flexibility in authorizing mail servers, improving email deliverability, and easy implementation.<\/p>"},{"question":"What are the common problems with SPF records and their solutions?","answer":"<p>Common problems with SPF records include exceeding the DNS lookup count and failure to authenticate emails sent through third-party services. These issues can be addressed by optimizing the SPF record to reduce DNS lookups and properly including third-party services in the SPF record.<\/p>"},{"question":"How do DNS SPF records relate to similar terms like DKIM and DMARC?","answer":"<p>While SPF specifies which servers can send mail on behalf of a domain, DKIM adds a digital signature to the email header for verification by the recipient. DMARC builds on both SPF and DKIM and specifies what should happen if an email fails SPF or DKIM checks.<\/p>"},{"question":"What future technologies are related to DNS SPF record?","answer":"<p>Future technologies related to DNS SPF record include BIMI, which enhances brand visibility and trust, and the increasing adoption of IPv6, which necessitates the compatibility of SPF records with IPv6 addresses.<\/p>"},{"question":"How do proxy servers interact with DNS SPF records?","answer":"<p>If a proxy server is used to send emails, its IP address must be included in the SPF record to ensure successful email delivery. Proxy server providers like OneProxy can provide consistent and static IP addresses for inclusion in the SPF record.<\/p>"}]},"_links":{"self":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476941","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki"}],"about":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/types\/wiki"}],"version-history":[{"count":0,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/wiki\/476941\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media\/476942"}],"wp:attachment":[{"href":"https:\/\/oneproxy.pro\/vn\/wp-json\/wp\/v2\/media?parent=476941"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}