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by pandemic_region 242 days ago
How can you see from the MX record if it is Microsoft?
2 comments
kyrra 242 days ago
The "dig" command can get them for you

$ dig ycombinator.com mx

  ;; ANSWER SECTION:
  ycombinator.com. 300 IN MX 20 alt1.aspmx.l.google.com.
  ycombinator.com. 300 IN MX 10 aspmx.l.google.com.
  ycombinator.com. 300 IN MX 20 alt2.aspmx.l.google.com.
  ycombinator.com. 300 IN MX 30 aspmx4.googlemail.com.
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pixel16 242 days ago
this doesnt work if they use a 3rd party email filtering service like mimecast or proofpoint fyi.
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neilv 242 days ago
Another red flag! :)
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ExoticPearTree 241 days ago
Proofpoint, definitely a very big red flag.
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janderson215 242 days ago
mxtoolbox.com
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adamcblodgett 242 days ago
I love this tool so much. It makes so many difficult things easy, and it does it cheaply or free in almost every instance.
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