Steam emails not arriving

I run my own email server and never have any trouble with email delivery – however recently some steam emails failed to arrive.

I checked I wasn’t in any blacklists with senderbase, then dug further.

Turns out I had SSL enabled on my MTA but using my old cert which was SHA1 & revoked (with a SHA-256 replacement issued), replacing that fixed mail deliveries.

Normally MTAs don’t care about the validity of MTA certs (a lot of them are self-signed) so I hadn’t bothered replacing the cert there – only on website, but it seems Steam does.

Upgrading my old ML115 server box

I’ve upgraded my old ML115 ESX box to Ubuntu 16.04, using OpenNebula as the virtualization platform. ON is available in the system repos, but this is an old version (4.1) so I’d advise using the ON repos. OpenNebula provides an EC2-compatible API, which allows the use of libcloud and there is also Docker integration.

Ubuntu 16.04 also allows me to investigate ZFS and SystemD (systemd-networkd makes configuring the bridging interface required for OpenNebula very easy).

cdx – switch to your other shell’s working directories

a quick shell script / bash function to switch to other working directories


Persistent ssh-agent in crosh developer shell

Put this at the bottom of your ~/.bashrc