How to understand the SMTP Server Response Codes

How to understand the SMTP Server Response Codes? Well, it comes out that all the SMTP Server Response Codes are standard. In other words, SMTP servers always respond to requests/commands using the very same defined set of codes. The SMTP Server Response Codes are part of the SMTP protocol, the set of rules used to send emails. As a reminder, an SMTP server is the type of server you use to send emails. SMTP is also the name of the protocol that defines the delivery of emails over the internet. Sending a message actually consists of connecting to an SMTP …

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