This document provides an overview of email delivery and security best practices. It discusses topics like authentication methods, content filtering, bounce handling, throttling, and using third party services for large mailings. Key points covered include SPF, DKIM, and reverse DNS configuration; blacklist checking; and techniques for reducing spam complaints.

1. 기
@river

2. PTMS
MTA(Message Transfer Agent)
MUA(Mail User Agent)

3. locotorP PTMS

4. retteL ,epolevnE
- Envelope
Letter
.

5. retteL ,epolevnE

6. ,
.

7. mapS itnA
Authentication: SPF, Sender ID, DKIM
Reputation: Blacklist, Volume/rate, User
voting, Bounce mgt, Behavior
Content Filtering: Images, Copy,
Construction, Subject, Linkes

8. SND esreveR
- Reverse DNS

9. - HTML
- SPF
DKIM DNS
IP
MIKD ,FPS : noitacitnehtuA

10. - SPF
/ Test Tool
DNS
- SPF
)krowemarF yciloP redneS(FPS

11. elpmaxE droceR SND FPS
epaaalnt I TT
clzmi.e. N X
"=p1i423222022-l"
vsf p:0.4.1.2 al
$dgepaaalnttx +hr
i clzmi.e et sot

12. -
'
'
)liaM
deifitnedI yeK niamoD(MIKD

13. elpmaxE droceR SND MIKD
mi.dmikyepaaalnt I TT"=KM;
al_oane.clzmi.e. N X vDI1
kra pMwDYKZhcAEBAaAaJAMaA
=s; =HwQJoIvNQBQDwwAhOdml
eOGsQP/ex3FJIVM1rPfbWzzUm
kq/a9giKC4Bje343GjOC2B2K
0ptJGeK+NSOqeUQNG36sqcuaT
iUDL/fBNv3pI7Yqsv9ehp+xC
pB6CxF8DyvdeIAA"
vSaghRRjEIOQDQB
$dgmi.dmikyepaaalnttx +hr
i al_oane.clzmi.e et sot

14. elpmaxe liame koobecaF

16. secnuoB
What happens when mail could not be
delivered?
- 5xx
- Mail Delivery Notification (MDN)
- Delivery Status Report (DSN)

17. htaP nruteR
- Return Path is another name for the
envelope sender
- It's the address to which bounces should
be sent
- It's usually the same as the From:
address
- But can be changed in transit using
schemes like SRS

18. )shtaP nruteR
epolevnE elbairaV(PREV
Rtr-ah:<one-e=miicmeapecm
eunPt
bucswzont.o@xml.o>
Fo :"yls"<yls@xml.o>
rm
m it m-iteapecm
T :wzont.o
o
e@miicm
Sbet:amsae
ujc
esg
Wloet m wrd!
ecm o y ol!!
- User replies go to my-list@example.com
- Bounces go to bounceswez=omniti.com@example.com

20. ecnuoB draH
- Recipient email address does not exist
- Domain name does not exist
- Recipient email server has completely
blocked delivery

21. ecnuoB tfoS
- Mailbox is full(over quota)
- Recipient email server is down or offline
- Email message is too large

22. gniretliF stnetnoC
- Don't use IP address for links
(http://193.24.33.1/page/)
- using both text and HTML or text only
- The higher the text to link and text to
image ratios, the better
- Unsubscribe link

23. gnilttorhT
Limit send speed per domain
40tofeun cnet fo 183.4.3,
5 o rqet oncs rm 9.71715
pes tyaanltr (hote)
lae r gi ae. trtld

24. - IP Reputation

25. 결
third party
MailChimp
12,000 emails/month free
.

26. uoY knahT