ã¡ãŒã«ãåä¿¡ç®±ã«å±ããªãå Žåãåå ã¯å¿ ãããæç¢ºã§ã¯ãããŸãããé ä¿¡æ§ã®åé¡ã¯ãæè¡çãªåé¡ãã¬ãã¥ããŒã·ã§ã³ã®æå·ãã³ã³ãã³ãããªã¬ãŒããŸãã¯ãªã¹ãå質ã®åé¡ããçããå¯èœæ§ããããŸãããã®ãã©ãã«ã·ã¥ãŒãã£ã³ã°ã¬ã€ãã¯ãåé¡ãäœç³»çã«èšºæãã广çãªä¿®æ£ãå®è£ ããã®ã«åœ¹ç«ã¡ãŸãã
é ä¿¡æ§ã®åé¡ãçè§£ãã
äœããééã£ãŠããããšãèªèããã
èŠåãµã€ã³
ã¡ããªã¯ã¹ããŒã¹ã®ã·ã°ãã«:
- éå°çã®çªç¶ã®äœäž
- éå°çã®æéçãªåŸã ãªäœäž
- ããŠã³ã¹çã®å¢å
- èŠæ çã®äžæ
- ã³ã³ãã³ã倿Žãªãã§ã®ã¯ãªãã¯çã®äœäž
ãã£ãŒãããã¯ã·ã°ãã«:
- ã¡ãŒã«ãåä¿¡ããŠããªããšãã顧客ããã®å ±å
- ã¹ãã ãã©ã«ãã§èŠã€ãã£ãã¡ãŒã«
- äžè¶³ããŠããéä¿¡ã«é¢ãããµããŒããã±ãã
- ãšã³ã²ãŒãžã¡ã³ãã®ãªãé 信確èª
æè¡çã·ã°ãã«:
- ããŠã³ã¹ã¡ãã»ãŒãžã®å¢å
- ãããã¯ãªã¹ãéç¥
- ãã°ã§ã®èªèšŒå€±æ
- ISP ãã£ãŒãããã¯ã«ãŒãã®èŠæ
ããŒã¹ã©ã€ã³ã®ç¢ºç«
éåžžã®ç¶æ ãç¥ã: ãã©ãã«ã·ã¥ãŒãã£ã³ã°ã®åã«ãéåžžã®ç¶æ ãã©ã®ãããªãã®ããç¥ã:
- å žåçãªéå°çã®ç¯å²
- äºæ³ãããããŠã³ã¹ç
- éåžžã®èŠæ ç
- éåžžã®é ä¿¡æé
åå·®ã®æ€åº: åé¡ã¯ããŒã¹ã©ã€ã³ããã®å€å:
- éå°çã® 20% 以äžã®äœäž = 調æ»ãå¿ èŠ
- 2% ãè¶ ããããŠã³ã¹ç = æžå¿µ
- 0.1% ãè¶ ããèŠæ ç = ç·æ¥
蚺æãã¬ãŒã ã¯ãŒã¯
åé¡ãèŠã€ããããã®äœç³»çãªã¢ãããŒãã
ã¹ããã 1: ããŒã¿ãåéãã
æ å ±ãåéãã:
- çŸåšã®ã¡ããªã¯ã¹(éå°ãã¯ãªãã¯ãããŠã³ã¹ãèŠæ )
- éå»ãšã®æ¯èŒ(é±ããšãæããš)
- 圱é¿ãåãããã£ã³ããŒã³(ãã¹ãŠãŸãã¯ç¹å®)
- 圱é¿ãåããã»ã°ã¡ã³ã(ãã¹ãŠãŸãã¯ç¹å®)
- 圱é¿ãåãã ISP(GmailãOutlookãYahoo ãªã©)
çããã¹ã質å:
- åé¡ã¯ãã€å§ãŸã£ãã?
- ãã®é ã«äœãå€ãã£ãã?
- ãã¹ãŠã®ã¡ãŒã«ã«åœ±é¿ããŠããããäžéšã®ã¿ã?
- ãã¹ãŠã®åä¿¡è ã«åœ±é¿ããŠããããç¹å®ã®ã»ã°ã¡ã³ãã?
- ãã¹ãŠã® ISP ã«åœ±é¿ããŠããããç¹å®ã® ISP ã?
ã¹ããã 2: åé¡ãåé¡ãã
åé¡ã«ããŽãª:
| ã«ããŽãª | çç¶ | äžè¬çãªåå |
|---|---|---|
| èªèšŒ | ããŠã³ã¹ãã¹ãã ãã©ã«ã | SPF/DKIM/DMARC ã®åé¡ |
| ã¬ãã¥ããŒã·ã§ã³ | åŸã ãªäœäžãç¹å®ã® ISP | èŠæ ãããŠã³ã¹ããšã³ã²ãŒãžã¡ã³ã |
| ãªã¹ãå質 | é«ãããŠã³ã¹ãäœããšã³ã²ãŒãžã¡ã³ã | ç¡å¹ãªã¢ãã¬ã¹ãå€ãããŒã¿ |
| ã³ã³ãã³ã | ã¹ãã ãã©ã«ããç¹å®ã®ãã£ã³ããŒã³ | ããªã¬ãŒã¯ãŒããæžåŒèšå® |
| æè¡ç | å®å šãªå€±æããšã©ãŒ | ãµãŒããŒã®åé¡ãèšå® |
ã¹ããã 3: 倿°ãåé¢ãã
ãã¹ãã¢ãããŒã:
- å°ããªãã¹ãã»ã°ã¡ã³ãã«éä¿¡
- ç°ãªãã³ã³ãã³ãã詊ã
- ç°ãªãéä¿¡æéããã¹ã
- ç¹å®ã® ISP ãåå¥ã«ãã§ãã¯
- æè¡çãªã»ããã¢ããã確èª
èªèšŒã®åé¡
æè¡çãªã»ããã¢ããã倱æãããšãã
èªèšŒåé¡ã®èšºæ
SPF ããã§ãã¯:
ããŒã«: MXToolboxãGoogle Admin Toolbox 確èªããããš: - SPF ã¬ã³ãŒããååšãã - ãã¹ãŠã®éä¿¡ IP ãå«ãŸããŠãã - DNS ã«ãã¯ã¢ããã 10 ãè¶ ããŠããªã - ããããŒã§ãã¹ã¹ããŒã¿ã¹
SPF ã®åé¡ãšä¿®æ£:
| åé¡ | çç¶ | ä¿®æ£ |
|---|---|---|
| SPF ã¬ã³ãŒãããªã | ããŠã³ã¹ãã¹ãã ãã©ã«ã | DNS ã« SPF ã¬ã³ãŒããäœæ |
| IP ãäžè¶³ããŠãã | äžéšã®ã¡ãŒã«ã倱æ | ãã¹ãŠã®éä¿¡ãœãŒã¹ã远å |
| ã«ãã¯ã¢ãããå€ããã | ã©ã³ãã ãªå€±æ | SPF ã¬ã³ãŒãããã©ããå |
| æ§æãšã©ãŒ | ãã¹ãŠã®ã¡ãŒã«ã倱æ | DNS æ§æãä¿®æ£ |
DKIM ããã§ãã¯:
ããŒã«: MXToolboxãmail-tester.com 確èªããããš: - DKIM 眲åãååšãã - 眲åãæ€èšŒããã - ããŒã DNS ã«å ¬éãããŠãã - From ãã¡ã€ã³ãšã®æŽåæ§
DKIM ã®åé¡ãšä¿®æ£:
| åé¡ | çç¶ | ä¿®æ£ |
|---|---|---|
| DKIM ããªã | ã¹ãã é 眮ãé«ã | DKIM 眲åãèšå® |
| ç¡å¹ãªçœ²å | 倱æ | ããŒãäžèŽããã確èªãåçæ |
| ããŒãå ¬éãããŠããªã | æ€èšŒã倱æ | DNS ã¬ã³ãŒããæ£ãã远å |
| æŽåæ§ã®åé¡ | DMARC ã®å€±æ | d= ã From ãã¡ã€ã³ãšäžèŽããããšãç¢ºèª |
DMARC ããã§ãã¯:
ããŒã«: MXToolboxãDMARC Analyzer 確èªããããš: - ã¬ã³ãŒããå ¬éãããŠãã - ããªã·ãŒèšå® - ã¬ããŒããèšå®ãããŠãã - æŽåæ§ããã¹ããŠãã
DMARC ã®åé¡ãšä¿®æ£:
| åé¡ | çç¶ | ä¿®æ£ |
|---|---|---|
| DMARC ããªã | ä¿¡é Œæ§ã®äœäž | DMARC ã¬ã³ãŒãã远å |
| ç¡æéã« p=none | éå®çãªå©ç¹ | quarantine/reject ã«é²ã |
| æŽåæ§ã倱æ | DMARC ã倱æ | SPF/DKIM ã®æŽåæ§ãä¿®æ£ |
| æ©ããã峿 Œå | æ£åœãªã¡ãŒã«ãæåŠ | p=none ã§éå§ãç£èŠ |
èªèšŒãã¹ãããã»ã¹
ã¹ããããã€ã¹ããã:
- mail-tester.com ã«ãã¹ãã¡ãŒã«ãéä¿¡
- èªèšŒçµæãã¬ãã¥ãŒ
- åä¿¡ããã¡ãŒã«ã®çããããŒããã§ãã¯
- MXToolbox ã䜿çšã㊠DNS ã¬ã³ãŒãã確èª
- ç¹å®ãããåé¡ãä¿®æ£
- åãã¹ã
ã¬ãã¥ããŒã·ã§ã³ã®åé¡
ISP ãããªããä¿¡é ŒããŠããªããšãã
ã¬ãã¥ããŒã·ã§ã³åé¡ã®èšºæ
éä¿¡ã¬ãã¥ããŒã·ã§ã³ããã§ãã¯:
Google Postmaster Tools:
- ãã¡ã€ã³ã¬ãã¥ããŒã·ã§ã³(é«ãäžãäœãæªã)
- IP ã¬ãã¥ããŒã·ã§ã³
- ã¹ãã ç
- èªèšŒç
Microsoft SNDS:
- IP ã¹ããŒã¿ã¹
- èŠæ ç
- ãã©ããããã
- ãã£ã«ã¿çµæ
ãµãŒãããŒãã£ããŒã«:
- Sender Score(Validity)
- Talos Intelligence(Cisco)
- BarracudaCentral
ã¬ãã¥ããŒã·ã§ã³ææš:
| ã·ã°ãã« | è¯å¥œ | æžå¿µ | æªã |
|---|---|---|---|
| èŠæ ç | <0.05% | 0.05-0.1% | >0.1% |
| ããŠã³ã¹ç | <1% | 1-2% | >2% |
| ã¹ãã ãã©ããããã | 0 | ãããã | è€æ° |
| ãããã¯ãªã¹ãã¹ããŒã¿ã¹ | ãªã | 1-2 ãã€ã㌠| ã¡ãžã£ãŒãªã¹ã |
äžè¬çãªã¬ãã¥ããŒã·ã§ã³åé¡
åé¡: çªç¶ã®ã¬ãã¥ããŒã·ã§ã³äœäž
èããããåå :
- ã¹ãã ãã©ããããã
- èŠæ ã®æ¥å¢
- 倧ããªããŠã³ã¹ã€ãã³ã
- ãããã¯ãªã¹ãæ²èŒ
蚺æã¹ããã:
- æè¿ã®ãããã¯ãªã¹ã远å ããã§ãã¯
- ãã£ãŒãããã¯ã«ãŒãã§èŠæ çãã¬ãã¥ãŒ
- æè¿ã®ããŠã³ã¹ãã¿ãŒã³ãåæ
- éä¿¡ãã¿ãŒã³ã®å€åãæ¢ã
ä¿®æ£:
- 圱é¿ãåãããã¡ã€ã³ãžã®éä¿¡ãäžæåæ¢
- ãªã¹ããç©æ¥µçã«ã¯ãªãŒãã³ã°
- ãããã¯ãªã¹ãã®åé€ãèŠæ±
- åŸã ã«éä¿¡ãåæ§ç¯
åé¡: åŸã ãªã¬ãã¥ããŒã·ã§ã³äœäž
èããããåå :
- ãšã³ã²ãŒãžã¡ã³ãã®äœäž
- ã¯ãªãŒãã³ã°ãªãã§ãªã¹ããå€ããªã
- èŠæ ã®å¢å
- éä¿¡ããªã¥ãŒã ã®å€å
蚺æã¹ããã:
- æéã®çµéãšãšãã«ãšã³ã²ãŒãžã¡ã³ããã°ã©ãå
- ãªã¹ãã®çµé幎æ°ååžãåæ
- èŠæ ã®ãã¬ã³ããã¬ãã¥ãŒ
- ããªã¥ãŒã ãšãšã³ã²ãŒãžã¡ã³ããæ¯èŒ
ä¿®æ£:
- éã¢ã¯ãã£ããªè³Œèªè ãåãšã³ã²ãŒãžãŸãã¯åé€
- 宿çãªãªã¹ããã€ãžãŒã³ãå®è£
- ãšã³ã²ãŒãžã¡ã³ãã®ãªã人ãžã®é »åºŠãæžãã
- ã³ã³ãã³ãæŠç¥ã調æŽ
ãããã¯ãªã¹ãã®åé¡
ãããã¯ãªã¹ãåé¡ã®ç¹å®:
ãã§ãã¯: MXToolbox ãããã¯ãªã¹ããã§ãã¯ å ¥å: éä¿¡ IP ãŸãã¯ãã¡ã€ã³ ã¬ãã¥ãŒ: ãã¹ãŠã®äž»èŠãªãããã¯ãªã¹ã
äž»èŠãªãããã¯ãªã¹ã:
- Spamhaus(æãéèŠ)
- Barracuda
- SORBS
- SpamCop
- UCEProtect
ãããã¯ãªã¹ãåé€ããã»ã¹:
- ãããã¯ãªã¹ããç¹å®
- åé€ããã»ã¹ãèŠã€ãã
- ãŸãæ ¹æ¬çãªåé¡ãä¿®æ£
- åé€ãªã¯ãšã¹ããéä¿¡
- åæ²èŒãç£èŠ
Spamhaus åé€:
- ã»ãšãã©ã®æ²èŒã¯ã»ã«ããµãŒãã¹
- åå ã®ç¹å®ãšä¿®æ£ãå¿ èŠ
- CSS/CBL ã¯ç¹å®ã®ã¢ã¯ã·ã§ã³ãå¿ èŠ
- SBL ã¯çŽæ¥é£çµ¡ãå¿ èŠãªå Žåããã
ãªã¹ãå質ã®åé¡
ããŒã¿ãåé¡ã®ãšãã
ãªã¹ãåé¡ã®èšºæ
é«ãããŠã³ã¹ç:
ããŠã³ã¹ã®çš®é¡:
- ããŒãããŠã³ã¹: ã¢ãã¬ã¹ãååšããªã
- ãœããããŠã³ã¹: äžæçãªé ä¿¡ã®åé¡
- ãããã¯ããŠã³ã¹: ãµãŒããŒã«ãã£ãŠæåŠ
åæ:
ããŠã³ã¹ãã°ã«ãŒãå: - ã¿ã€ã(ããŒã vs. ãœãã) - ãã¡ã€ã³ - ãªã¹ãã»ã°ã¡ã³ã - ç²åŸãœãŒã¹
äžè¬çãªãã¿ãŒã³:
| ãã¿ãŒã³ | èããããåå | ä¿®æ£ |
|---|---|---|
| ãã¹ãŠã§é«ãããŒãããŠã³ã¹ | å€ã/æªæ€èšŒã®ãªã¹ã | ãªã¹ãå šäœãæ€èšŒ |
| 1 ã€ã®ãœãŒã¹ããé«ãããŠã³ã¹ | æªãç²åŸãã£ãã« | ãœãŒã¹ãã¬ãã¥ãŒ/é€å» |
| ãœããããŠã³ã¹ã®å¢å | ã¬ãã¥ããŒã·ã§ã³ã®äœäž | ã¬ãã¥ããŒã·ã§ã³åé¡ã«å¯ŸåŠ |
| ãã¡ã€ã³åºæã®ããŠã³ã¹ | ãããã¯ãªã¹ããŸãã¯ã¹ããããªã³ã° | ãã®ãã¡ã€ã³ãå ·äœçã«ãã§ã㯠|
äœããšã³ã²ãŒãžã¡ã³ã:
çç¶:
- æ¥çãã³ãããŒã¯ãå€§å¹ ã«äžåãéå°ç
- ã¯ãªãã¯çãæå°é
- è¿ä¿¡ãã€ã³ã¿ã©ã¯ã·ã§ã³ããªã
- ã¡ãŒã«ããã®ã³ã³ããŒãžã§ã³ãã»ãŒãŒã
åå :
- ãšã³ã²ãŒãžã¡ã³ãã®ãªã賌èªè
- åä¿¡ç®±ãžã®é çœ®ãæªã
- ç¡é¢ä¿ãªã³ã³ãã³ã
- ééã£ããªãŒãã£ãšã³ã¹
蚺æ:
- ãšã³ã²ãŒãžã¡ã³ãã¬ãã«ã§ã»ã°ã¡ã³ãå
- é 眮ããã§ãã¯(ã·ãŒããã¹ãã䜿çš)
- 賌èªè ã調æ»
- ã³ã³ãã³ãã®é¢é£æ§ãã¬ãã¥ãŒ
ãªã¹ãã¯ãªãŒãã³ã°ããã»ã¹
峿ã¢ã¯ã·ã§ã³:
- ãã¹ãŠã®ããŒãããŠã³ã¹ãåé€
- ç¹°ãè¿ãã®ãœããããŠã³ã¹ãåé€
- æããã«ç¡å¹ãªåœ¢åŒãåé€
- 圹å²ã¢ãã¬ã¹(info@ãadmin@)ãåé€
æ€èšŒ:
- æ€èšŒãµãŒãã¹ãéããŠãªã¹ãå šäœãå®è¡
- ç¡å¹ããªã¹ã¯ãäžæãªã¢ãã¬ã¹ãåé€
- æ€èšŒæžã¿ã®é ä¿¡å¯èœãªã¢ãã¬ã¹ã®ã¿ãä¿æ
ç¶ç¶ç:
- ãã£ããã£æç¹ã§ã¡ãŒã«ãæ€èšŒ
- 宿çãªåæ€èšŒ(ååæããš)
- é·æçã«ãšã³ã²ãŒãžã¡ã³ãã®ãªããã®ãåé€
- ç¶ç¶çãªã¡ããªã¯ã¹ãç£èŠ
ã³ã³ãã³ãã®åé¡
ã³ã³ãã³ãããã£ã«ã¿ãããªã¬ãŒãããšãã
ã³ã³ãã³ãåé¡ã®èšºæ
ã³ã³ãã³ãåé¡ã®å å:
- ç¹å®ã®ã¡ãŒã«ãã¹ãã ã«è¡ãããä»ã®ã¡ãŒã«ã¯è¡ããªã
- åããªã¹ããã³ã³ãã³ãã«ãã£ãŠç°ãªãçµæ
- A/B ãã¹ãã§ã³ã³ãã³ãããŒã¹ã®éãã衚瀺ããã
- èªèšŒãã¬ãã¥ããŒã·ã§ã³ã®åé¡ããªã
ã³ã³ãã³ãåæ:
- ã¹ãã ãã§ãã«ãŒ(mail-tester.com)ãéããŠã¡ãŒã«ãå®è¡
- SpamAssassin ã¹ã³ã¢ããã§ãã¯
- ããªã¬ãŒã¯ãŒãã®ååšãã¬ãã¥ãŒ
- HTML/ããã¹ãæ¯çãåæ
- ãªã³ã¯ãšãã¡ã€ã³ããã§ãã¯
äžè¬çãªã³ã³ãã³ãããªã¬ãŒ
åèªãšãã¬ãŒãº:
- "FREE!!!"(é床ã®å€§æå/å¥èªç¹)
- "Act now"
- "Limited time"
- "Click here"
- "Congratulations"
- "Winner"
泚æ: åã ã®åèªãããæèãéèŠã§ããèªç¶ãªäœ¿çšã¯éåžžåé¡ãããŸããããé床ãŸãã¯æäœçãªäœ¿çšã¯ãã£ã«ã¿ãããªã¬ãŒããŸãã
ãã©ãŒãããã®åé¡:
- ç»åãå€ãããããã¹ããå°ãªãã
- ãã¹ãŠå€§æåã®ããã¹ã
- é床ã®å¥èªç¹(!!!)
- 倧éã®ãªã³ã¯
- æããèµ€ã®ããã¹ã
- 極å°ããã¹ã(é ãããã³ã³ãã³ã)
æè¡çãªåé¡:
- å£ãã HTML
- ããã¹ãããŒãžã§ã³ããªã
- ãã¡ã€ã«ãµã€ãºã倧ãããã
- çãããæ·»ä»ãã¡ã€ã«
- ãªãã€ã¬ã¯ããªã³ã¯
ã³ã³ãã³ãã®ä¿®æ£
ä»¶å:
- ã¹ãã ããªã¬ãŒã¯ãŒããé¿ãã
- ãã¹ãŠå€§æåã䜿ããªã
- å¥èªç¹ãå¶é
- é©åãªé·ããä¿ã€
- ã³ã³ãã³ãã«ã€ããŠæ£çŽã«
ã¡ãŒã«æ¬æ:
- ç»åãšããã¹ãã®ãã©ã³ã¹ãåã
- ã¯ãªãŒã³ãª HTML ã䜿çš
- ããã¹ãããŒãžã§ã³ãå«ãã
- ãªã³ã¯ãæå°éã«
- è©å€ã®è¯ããªã³ã¯ãã¡ã€ã³ã䜿çš
ãã¹ã:
- éä¿¡åã«å¿ ããã¹ã
- ã¹ãã ãã§ãã«ãŒããŒã«ã䜿çš
- è€æ°ã® ISP ããã§ãã¯
- ããªãšãŒã·ã§ã³ã A/B ãã¹ã
æè¡çãªåé¡
ã€ã³ãã©ã¹ãã©ã¯ãã£ã倱æãããšãã
ãµãŒããŒãšèšå®ã®åé¡
éä¿¡ãµãŒããŒã®åé¡:
- ãµãŒããŒããã©ãã¯ãªã¹ãã«æ²èŒ
- äžé©åãªèšå®
- SSL/TLS ã®åé¡
- ã¬ãŒãå¶é
蚺æã³ãã³ã:
# MX ã¬ã³ãŒãããã§ã㯠dig MX example.com # SPF ããã§ã㯠dig TXT example.com # DKIM ããã§ã㯠dig TXT selector._domainkey.example.com # SMTP æ¥ç¶ããã¹ã telnet mail.example.com 25
ESP ã®åé¡:
- ãã©ãããã©ãŒã ã®é ä¿¡æ§ã®åé¡
- å ±æ IP ã¬ãã¥ããŒã·ã§ã³
- èšå®ãšã©ãŒ
- ã¢ã«ãŠã³ãã®åé¡
DNS ã®åé¡
äžè¬ç㪠DNS ã®åé¡:
- ã¬ã³ãŒããäŒæãããŠããªã
- äžé©åãªæ§æ
- ã¬ã³ãŒããäžè¶³ããŠãã
- ç«¶åããã¬ã³ãŒã
DNS ãã©ãã«ã·ã¥ãŒãã£ã³ã°:
1. DNS äŒæããã§ãã¯(whatsmydns.net) 2. ã¬ã³ãŒãæ§æãç¢ºèª 3. è€æ°ã® DNS ãµãŒããŒã§ãã¹ã 4. æåŸ å€ãšå®éã®å€ãæ¯èŒ
ã¬ãŒãå¶éãšã¹ããããªã³ã°
çç¶:
- ã¡ãŒã«ããã£ããé ä¿¡ããã
- ãæ¥ç¶ãå€ãããŸãããšããããŠã³ã¹ããã
- äžè²«æ§ã®ãªãé ä¿¡æé
åå :
- éä¿¡ãéããã
- éä¿¡ããªã¥ãŒã ãå€ããã
- æ°ãã IP/ãã¡ã€ã³ããŠã©ãŒã ã¢ãããããŠããªã
- ISP åºæã®å¶é
ä¿®æ£:
- éä¿¡ã¬ãŒããæžãã
- éä¿¡ãæéããããŠåæ£
- æ°ãã IP/ãã¡ã€ã³ãé©åã«ãŠã©ãŒã ã¢ãã
- ISP ã¬ã€ãã©ã€ã³ãå°é
ISP åºæã®åé¡
ç¹å®ã®ã¡ãŒã«ããã¯ã¹ãããã€ããŒã«åœ±é¿ããåé¡ã®ãšãã
Gmail ã®åé¡
蚺æ:
- Google Postmaster Tools ãå¿ èŠ
- ãã¡ã€ã³ãš IP ã¬ãã¥ããŒã·ã§ã³ããã§ãã¯
- ã¹ãã çãã¬ãã¥ãŒ
äžè¬ç㪠Gmail ã®åé¡:
| åé¡ | åå | ä¿®æ£ |
|---|---|---|
| ããã¢ãŒã·ã§ã³ã¿ã | 忥ã³ã³ãã³ã | ããããŒãœãã«ãªã³ã³ãã³ã |
| ã¹ãã ãã©ã«ã | äœããšã³ã²ãŒãžã¡ã³ããã¬ãã¥ããŒã·ã§ã³ | ãšã³ã²ãŒãžã¡ã³ããæ¹åãèªèšŒ |
| é ãé ä¿¡ | ã¹ããããªã³ã° | ã¬ãŒããæžãããã¬ãã¥ããŒã·ã§ã³ãæ¹å |
| ããŠã³ã¹ | ããªã·ãŒããã㯠| Google ã¬ã€ãã©ã€ã³ããã§ã㯠|
Gmail ã®ãã¹ããã©ã¯ãã£ã¹:
- Google Postmaster Tools ã䜿çš
- ãšã³ã²ãŒãžã¡ã³ããç¶æ
- é©åã«èªèšŒ
- éä¿¡è ã¬ã€ãã©ã€ã³ã«åŸã
- ã¯ã³ã¯ãªãã¯ç»é²è§£é€ãæå¹å
Microsoft(Outlook.comãHotmail)ã®åé¡
蚺æ:
- Microsoft SNDS
- ãžã£ã³ã¯ã¡ãŒã«ã¬ããŒãããã°ã©ã (JMRP)
äžè¬ç㪠Microsoft ã®åé¡:
| åé¡ | åå | ä¿®æ£ |
|---|---|---|
| è¿·æã¡ãŒã«ãã©ã«ã | äœãã¬ãã¥ããŒã·ã§ã³ | ãšã³ã²ãŒãžã¡ã³ããæ§ç¯ãã¬ãã¥ãŒãèŠæ± |
| ããã㯠| ããªã·ãŒéå | ãã¹ããã¹ã¿ãŒã«é£çµ¡ |
| é ãé ä¿¡ | ã¹ããããªã³ã° | ããªã¥ãŒã ãæžãããã¡ããªã¯ã¹ãæ¹å |
Microsoft ã®ãã¹ããã©ã¯ãã£ã¹:
- SNDS ã«ç»é²
- JMRP ãã£ãŒãããã¯ã«ãŒãã«åå
- Microsoft ã¬ã€ãã©ã€ã³ã«åŸã
- åé¡ã«ã€ããŠãã¹ããã¹ã¿ãŒã«é£çµ¡
Yahoo ã®åé¡
蚺æ:
- Yahoo Postmaster
- ãã£ãŒãããã¯ã«ãŒãããŒã¿
äžè¬ç㪠Yahoo ã®åé¡:
- ç©æ¥µçãªãã£ã«ã¿ãªã³ã°
- ã¬ãã¥ããŒã·ã§ã³ã®æåºŠ
- ã¬ãŒãå¶é
Yahoo ã®ãã¹ããã©ã¯ãã£ã¹:
- Yahoo Postmaster ã«ç»é²
- ãã£ãŒãããã¯ã«ãŒããå®è£
- äœãèŠæ çãç¶æ
- Yahoo ã¬ã€ãã©ã€ã³ã«åŸã
ãã©ãã«ã·ã¥ãŒãã£ã³ã°ã¯ãŒã¯ãããŒ
åé¡ã解決ããããã®äœç³»çãªã¢ãããŒãã
ã¹ããããã€ã¹ãããããã»ã¹
ã¹ããã 1: åé¡ãç¹å®ãã
- ã©ã®ã¡ããªã¯ã¹ã圱é¿ãåããŠããã? - ãã€å§ãŸã£ãã? - ã©ã®çšåºŠæ·±å»ã? - 誰/äœã圱é¿ãåããŠããã?
ã¹ããã 2: 蚌æ ãåéãã
- é¢é£ããã¡ããªã¯ã¹ãåŒãåºã - èªèšŒããŒã«ããã§ã㯠- ã¬ãã¥ããŒã·ã§ã³ããã·ã¥ããŒããã¬ãã¥ãŒ - ããŠã³ã¹ã¡ãã»ãŒãžãåæ - çŸåšã®ã¡ãŒã«ããã¹ã
ã¹ããã 3: 仮説ã圢æãã
蚌æ ã«åºã¥ããŠãæãå¯èœæ§ã®é«ãåå ã¯: [ ] èªèšŒã®åé¡ [ ] ã¬ãã¥ããŒã·ã§ã³ã®åé¡ [ ] ãªã¹ãå質ã®åé¡ [ ] ã³ã³ãã³ãããªã¬ãŒ [ ] æè¡çãªå€±æ
ã¹ããã 4: 仮説ããã¹ããã
- 倿°ãåé¢ - å¶åŸ¡ããããã¹ããå®è¡ - çµæãæ¯èŒ - 仮説ã確èªãŸãã¯ä¿®æ£
ã¹ããã 5: ä¿®æ£ãå®è£ ãã
- çãçµã£ããœãªã¥ãŒã·ã§ã³ãé©çš - æ¹åãç£èŠ - 倿Žãææžå - äºé²ãèšå®
ã¹ããã 6: è§£æ±ºãæ€èšŒãã
- ã¡ããªã¯ã¹ãããŒã¹ã©ã€ã³ã«æ»ã£ãŠããã? - åé¡ãããçºçããŠããªãã? - æ°ããåé¡ã¯äœæãããŠããªãã? - äºé²çã¯æŽã£ãŠããã?
ãã·ãžã§ã³ããªãŒ
éå°çãäœã? âââ èªèšŒããã§ã㯠â 倱æ? â èªèšŒãä¿®æ£ âââ ã¬ãã¥ããŒã·ã§ã³ããã§ã㯠â äœã? â ã¬ãã¥ããŒã·ã§ã³ãæ¹å âââ é ä¿¡æ§ããã§ã㯠â ã¹ãã ã«çå°? â ã¹ãã ããªã¬ãŒã«å¯ŸåŠ âââ ã³ã³ãã³ãããã§ã㯠â ä»¶åãæªã? â ä»¶åãæ¹å ããŠã³ã¹ãå€ã? âââ ã»ãšãã©ããŒãããŠã³ã¹? â ãªã¹ããæ€èšŒããŠã¯ãªãŒãã³ã° âââ ç¹å®ã®ãã¡ã€ã³? â ãããã¯ãªã¹ãããã§ã㯠âââ æè¿ã®ãªã¹ã倿Ž? â æ°ããããŒã¿ãœãŒã¹ãã¬ãã¥ãŒ âââ çªç¶ã®å¢å ? â æè¡çãªåé¡ããã§ãã¯ èŠæ ãå€ã? âââ ã³ã³ãã³ãã®èŠæ ? â ã³ã³ãã³ãã®äŸ¡å€ãã¬ãã¥ãŒ âââ é »åºŠã®èŠæ ? â é »åºŠãæžãã âââ éä¿¡è äžæ? â éä¿¡è åã®èªèãæ¹å âââ èš±å¯ã®åé¡? â åæã®æ £è¡ãã¬ãã¥ãŒ
äºé²æŠç¥
åé¡ãå§ãŸãåã«æ¢ããã
ç£èŠã·ã¹ãã
ã¢ã©ãŒããèšå®ãã:
- éå°çã 20% 以äžäœäž
- ããŠã³ã¹çã 2% ãè¶ ãã
- èŠæ çã 0.1% ãè¶ ãã
- ãããã¯ãªã¹ãã®è¿œå
- èªèšŒã®å€±æ
宿çãªãã§ãã¯:
- æ¯æ¥: é ä¿¡ã¡ããªã¯ã¹
- æ¯é±: ã¬ãã¥ããŒã·ã§ã³ããã·ã¥ããŒã
- æ¯æ: å®å šãªé ä¿¡æ§ç£æ»
- ååæããš: ãªã¹ãæ€èšŒ
ãã¹ããã©ã¯ãã£ã¹
èªèšŒ:
- SPFãDKIMãDMARC ãå®è£
- èªèšŒã¬ããŒããç£èŠ
- éä¿¡è ã远å ãããšãã«ã¬ã³ãŒããæŽæ°
- DMARC ã p=reject ã«é²ãã
ã¬ãã¥ããŒã·ã§ã³:
- äœãèŠæ çãç¶æ
- ããŠã³ã¹çãæå°éã«ä¿ã€
- ãã£ãŒãããã¯ãç£èŠããŠå¯Ÿå¿
- æ°ãã IP/ãã¡ã€ã³ããŠã©ãŒã ã¢ãã
ãªã¹ãå質:
- ãã£ããã£æã«æ€èšŒ
- 宿çã«ã¯ãªãŒãã³ã°
- ãšã³ã²ãŒãžã¡ã³ãã®ãªããã®ãåé€
- åæèšé²ãç¶æ
ã³ã³ãã³ã:
- éä¿¡åã«ãã¹ã
- ã¹ãã ãã§ãã«ãŒã䜿çš
- ãã¹ããã©ã¯ãã£ã¹ã«åŸã
- ããã©ãŒãã³ã¹ãç£èŠ
ãã©ãã«ã·ã¥ãŒãã£ã³ã°ãã§ãã¯ãªã¹ã
åæè©äŸ¡
- [ ] 圱é¿ãåããå ·äœçãªã¡ããªã¯ã¹ãç¹å®
- [ ] åé¡ãå§ãŸã£ãææã決å®
- [ ] ç¯å²ãç¹å®(ãã¹ãŠã®ã¡ãŒã«ãŸãã¯ç¹å®)
- [ ] ããŒã¹ã©ã€ã³æ¯èŒãåé
èªèšŒãã§ãã¯
- [ ] SPF ã¬ã³ãŒããæå¹ã§ãã¹
- [ ] DKIM ãèšå®ãããŠãã¹
- [ ] DMARC ãå ¬éãããŠæŽå
- [ ] ãã°ã«èªèšŒãšã©ãŒããªã
ã¬ãã¥ããŒã·ã§ã³ãã§ãã¯
- [ ] Google Postmaster ãã¬ãã¥ãŒ
- [ ] Microsoft SNDS ãã¬ãã¥ãŒ
- [ ] ãããã¯ãªã¹ãã¹ããŒã¿ã¹ããã§ãã¯
- [ ] Sender Score ããã§ãã¯
- [ ] èŠæ çã蚱容ç¯å²å
ãªã¹ãå質ãã§ãã¯
- [ ] ããŠã³ã¹çã 2% æªæº
- [ ] ããŒãããŠã³ã¹ãåé€ãããŠãã
- [ ] ãªã¹ããæè¿æ€èšŒãããŠãã
- [ ] ãšã³ã²ãŒãžã¡ã³ãçãå¥å š
ã³ã³ãã³ããã§ãã¯
- [ ] ã¹ãã ã¹ã³ã¢ã蚱容ç¯å²å
- [ ] æãããªããªã¬ãŒããªã
- [ ] HTML ãã¯ãªãŒã³ã§æå¹
- [ ] ãªã³ã¯ãæ©èœãè©å€ãè¯ã
æè¡çãã§ãã¯
- [ ] ãµãŒããŒãé©åã«èšå®ãããŠãã
- [ ] DNS ã¬ã³ãŒããæ£ãã
- [ ] ã€ã³ãã©ã¹ãã©ã¯ãã£ã®åé¡ããªã
- [ ] ESP ã¹ããŒã¿ã¹ã確èªãããŠãã
äºé²ãšããŠã®ããŒã¿å質
æ€èšŒãåé¡ãé²ãçç±ã
æ ¹æ¬åå ã®åé¡
å€ãã®é ä¿¡æ§ã®åé¡ã¯æ¬¡ã®ããšããå§ãŸã:
- ãªã¹ãäžã®ç¡å¹ãªã¢ãã¬ã¹
- å€ãããŒã¿ããã®ã¹ãã ãã©ãã
- é«ãããŠã³ã¹ç
- äœäžãããšã³ã²ãŒãžã¡ã³ãã¡ããªã¯ã¹
æ€èšŒãé²ããã®:
- ããŠã³ã¹é¢é£ã®ã¬ãã¥ããŒã·ã§ã³æå·
- ã¹ãã ãã©ããããã
- ç¡é§ãªéä¿¡
- æªãã ã¡ããªã¯ã¹
æ€èšŒæŠç¥
ãã£ããã£æ: ãªã¹ãã«å ¥ãåã«ãã¹ãŠã®ã¡ãŒã«ãæ€èšŒããŸãã
宿çãªã¯ãªãŒãã³ã°: ååæããšã«ãªã¹ãå šäœãåæ€èšŒããŸãã
äž»èŠãªãã£ã³ããŒã³ã®å: éèŠãªéä¿¡ã®åã«ãªã¹ããæ€èšŒããŸãã
åé¡ã®åŸ: é ä¿¡æ§ã®åé¡ã®åŸãæ€èšŒããŠã¯ãªãŒãã³ã°ããŸãã
çµè«
é ä¿¡æ§ã®ãã©ãã«ã·ã¥ãŒãã£ã³ã°ã«ã¯ãä¿®æ£ãé©çšããåã«äœç³»çãªèšºæãå¿ èŠã§ããåé¡ã®ã«ããŽãªãŒ(èªèšŒãã¬ãã¥ããŒã·ã§ã³ããªã¹ãå質ãã³ã³ãã³ãããŸãã¯æè¡ç)ãçè§£ããããšã§ãæ£ãã解決çã«ãã©ãçããŸãã
äž»èŠãªãã©ãã«ã·ã¥ãŒãã£ã³ã°ã®åå:
- ãŸãããŒã¿ãåéãã: æšæž¬ããåã«å®éã«äœãèµ·ãã£ãŠããããç¥ã
- åé¡ãåé¡ãã: ç°ãªãåé¡ã«ã¯ç°ãªãä¿®æ£ãå¿ èŠ
- 仮説ããã¹ããã: 倧ããªå€æŽã®åã«èšºæãæ€èšŒ
- äœç³»çã«ä¿®æ£ãã: çç¶ã ãã§ãªãæ ¹æ¬åå ã«å¯ŸåŠ
- åçºãé²ã: åé¡ãæ©æã«æããã·ã¹ãã ãæ§ç¯
ã»ãšãã©ã®é ä¿¡æ§ã®åé¡ã¯ãªã¹ãå質ã«ããã®ãŒããŸããç¡å¹ãªã¢ãã¬ã¹ã¯ããŠã³ã¹ãåŒãèµ·ãããã¬ãã¥ããŒã·ã§ã³ãå·ã€ããé²åŸ¡çãªãã£ã«ã¿ãããªã¬ãŒããŸãã
ãœãŒã¹ã§ã®é ä¿¡æ§ã®åé¡ãé²ãæºåã¯ã§ããŸããã? BillionVerify ã§å§ããŸããã ã¡ãŒã«ãªã¹ããæ€èšŒããåä¿¡ç®±ãžã®é 眮ãç¶æããŸãã