POP before SMTP or SMTP after POP is a method of authentication used by mail server software which helps allow users the option to send e-mail from any location, as long as they can demonstrably also fetch their mail from the same place. The POP before SMTP approach has been superseded by SMTP Authentication.
POP before SMTP or SMTP after POP is a method of authentication used by mail server software which helps allow users the option to send e-mail from any location, as long as they can demonstrably also fetch their mail from the same place. The POP before SMTP approach has been superseded by SMTP Authentication.
Source: Wikipedia "POP before SMTP" · CC BY-SA 4.0
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