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Emails coming in to Mail in code

Just lately a few emails have been coming in to my inbox on Mail in code. For example:

----boundary_1307151_9deba79e-0835-4b29-a586-44143eaff7c7

Content-Type: multipart/ALTERNATIVE;

boundary=--boundary_1307149_103a060b-b2ea-4523-8dcc-c86f3cbc7f39



----boundary_1307149_103a060b-b2ea-4523-8dcc-c86f3cbc7f39

Content-Transfer-Encoding: QUOTED-PRINTABLE

Content-Type: TEXT/PLAIN;

charset=us-ascii

These same emails come in to the inbox on my iPhone completely as they should be. Can someone please tell me what's going on, and how I might go about stopping this? The sender is completely legit.

Thanks in advance,

Zoe

MacBook Air, macOS High Sierra (10.13.2)

Posted on Mar 1, 2018 5:50 PM

Reply
10 replies

Mar 1, 2018 6:58 PM in response to BobTheFisherman

There are two senders whose emails have this problem - both big companies who are attaching a .pdf with my monthly statement. I don't have a third party app such as an antivirus app. The only things I have like that are CleanMyMac which is an independent app (and I've had it for ages), and a few plugs ins for Chrome. All of these have been fine for years. I think it's only happened since I installed High Sierra, but I can't be sure about that.

Emails coming in to Mail in code

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