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isoinfo
2018 Apr 15
2
52.184.164.73 in my logs
...:17:58 imap-login: Info: Login: user=<xxx at mydomain.tld>, method=LOGIN, rip=52.184.164.73, lip=10.10.10.19, mpid=19286, TLS, session=<E6cEB4BprgA0uKRJ>
Both lines show a remote IP of 52.184.164.73, which is strange since all my users are, and connect from, Algeria. According to the ispinfo website (http://www.ispinfo.net/isp/52.184.164.73.html), this IP belongs to Microsoft.
Could it be that the outlook app uses microsoft's servers to fetch the mail before handing them to the user ?
Daniel.