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Digital product guides

Practical guides to digital product types, listing attributes, and the data that may be included. Learn how to understand catalog terms and compare individual listings.

Email services

1 guide

Email accounts: formats, access and verification.

6 min read

What is IMAP, and how do POP3, SMTP and OAuth2 differ?

IMAP and POP3 retrieve mail, SMTP sends it and OAuth2 controls how an application is authorized. A useful listing must connect those labels to the data actually included.

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