Simple Mail Transfer Protocol (SMTP) is the standard protocol for sending and receiving e-mail on a Transmission Control Protocol (TCP)/IP network. SMTP provides the ability to send and receive email messages via Standard SMTP Port.

SMTP Error 550

SMTP Error 550 The SMTP error code 550 means that your requested SMTP action was not completed. Most common reason for getting this error are either: recipient SMTP server is…
smtp error 550

Open SMTP Relay Server: What, Why and How?

What is an open SMTP relay server? before understanding “what is an open SMTP relay server?” one should know what an “SMTP relay server” is? . If that is the…
Open SMTP relay server - what, why and how