My reference writer wants to email me their letter of recommendation, is that okay?

No. At no time should any JET applicant view the letters of recommendation themself. If your reference writer cannot provide you with the letter as the instructions state (i.e. they are experiencing technical difficulties with uploading their letter to the online portal) and instead wishes to send it directly to the JET Program Office, please have him/her contact our office directly first by phone or email.