Sign in
|
English
|
Terms of Use
Dictionary
Forum
Contacts
Chinese
⇄
Czech
English
French
Icelandic
Kazakh
Portuguese
Russian
Vietnamese
G
o
o
g
l
e
|
Forvo
|
+
寄件人政策架構
comp., MS
SPF
An extension of the SMTP protocol that prevents spammers from forging the From: fields in e-mail messages by verifying that the IP address in the SMTP Received: header is authorized to send e-mail for the sender's domain
(SPF)
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Add
|
The server is undergoing maintenance and the site is working in read-only mode. Please check back later.">
Report an error
|
Get short URL
|
Language Selection Tips