Can't send emails through Office 365 SMTP - Client host blocked using Spamhaus


Windows server and Kyocera photocopier can no longer send emails through Office 365 SMTP server ( The issue started happening after ISP change (new ISP was UK's PlusNet). After checking PowerShell mail send script output I found following error:

Exception calling "Send" with "1" argument(s): "Mailbox unavailable. The server response was: 5.7.1 Service unavailable, Client host [] blocked using Spamhaus.

Google Home Bluetooth issues: "Sorry, power controls is not yet supported"

Google Home Hub

I play music on my Google Home Hub through an external Samsung Bluetooth speaker. The initial pairing has to be done from Google Home app, but after this, it's sufficient to say "Hei Google, connect to Bluetooth" and Google Home would say "OK, looking for paired devices" and almost immediately connect to the speaker. This worked absolutely fine for around 6 months and then suddenly Google Home Hub instead of connecting to Bluetooth would respond "Sorry, power controls is not yet supported..."

Import PST files to Office 365 Exchange

  • Assign Mailbox Import Export role to yourself (can take up to 24 hour to take effect, normally around 1 hour):
    • Exchange Admin Centre > Permissions > Admin Roles. Create a new role:
      • Name: Import / Export
      • Write Scope: Default
      • Roles: Mailbox Import Export
      • Members: <admin name>
  • Go to Office 365 Security & Compliance > Data Governance > Import. Click on New import job and complete a simple wizard (choose Upload your Data option).


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