2019-12-02 01:13:39 +01:00
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import dns.resolver
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def get_mx_domains(hostname) -> [str]:
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answers = dns.resolver.query(hostname, "MX")
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ret = []
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for a in answers:
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record = a.to_text() # for ex '20 alt2.aspmx.l.google.com.'
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r = record.split(" ")[1] # alt2.aspmx.l.google.com.
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ret.append(r)
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return ret
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2019-12-06 11:54:01 +01:00
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_include_spf = "include:"
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def get_spf_domain(hostname) -> [str]:
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"""return all domains listed in *include:*"""
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try:
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answers = dns.resolver.query(hostname, "TXT")
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except dns.resolver.NoAnswer:
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return []
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ret = []
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for a in answers: # type: dns.rdtypes.ANY.TXT.TXT
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for record in a.strings:
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record = record.decode() # record is bytes
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if record.startswith("v=spf1"):
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parts = record.split(" ")
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for part in parts:
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if part.startswith(_include_spf):
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ret.append(part[part.find(_include_spf) + len(_include_spf) :])
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return ret
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