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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
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