Error messages are incomprehensible. The reason behind the SMTP problem depends on the error code. The solution to resolve each error code is also unique. SMTP (Simple Mail Transfer Protocol) is a set of guidelines that allow the email program to transmit email messages over the internet. An SMTP error code is a three-digit code that occurs when there is a communication error. These three codes give information about the problem. The mail server responds to every request your email program makes with a return code. If you see the SMTP error code 240, here are the possible causes of this problem.
To resolve the SMTP code 240, carry out the quick troubleshooting steps given on this web page.
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