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尝试在@后面的任何内容上运行 gethostbyname() ,如果它不返回 IP,则它不是有效的 DNS
try running gethostbyname() on whatever is after the @ and if it doesnt return an IP, its not a valid DNS
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尝试在@后面的任何内容上运行 gethostbyname() ,如果它不返回 IP,则它不是有效的 DNS
try running gethostbyname() on whatever is after the @ and if it doesnt return an IP, its not a valid DNS