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Ian Ling's questions

Martin Hope
Ian Ling
Asked: 2016-06-11 09:19:23 +0800 CST
  • 2

In Office365, we have a distribution group, [email protected], set up with the following members:

If an internal user (i.e. an @company.com email address) sends an email to [email protected], all members of the group receive the email.

However, if an external user sends an email to [email protected], only the internal users receive an email. The external users don't even receive an NDR, even though I have ReportToOriginatorEnabled set to True on the group.

This question shows how to fix issue of emails not being delivered in Exchange 2010: Distribution list with external email sent from outside, however, the solution in the linked question was already in place. There was nothing for me to change, so I'm still experiencing the same issue.

Message Trace in Office365 reports that the email to the external member of the group was successfully delivered to the external SMTP server, but I have tested using Gmail and several other services, and none of them receive the email, or an NDR.

email exchange smtp microsoft-office-365 distribution-lists
Martin Hope
Ian Ling
Asked: 2015-11-03 11:10:26 +0800 CST
  • 2

I have a server using /dev/vg1/root as its / mount. I am trying to set up DRBD so that ServerA's vg1-root is mirrored to another LVM volume on ServerB, vg1-ServerA-root.

I am able to create the metadata on ServerA's vg1-root, but I cannot attach the resource.

ian@ServerA:/etc/drbd.d$ sudo drbdadm attach all
open(/dev/vg1/root) failed: Device or resource busy
Operation canceled.
Command 'drbdmeta 0 v08 /dev/vg1/root internal apply-al' terminated with exit code 20
debian
Martin Hope
Ian Ling
Asked: 2015-10-01 14:46:25 +0800 CST
  • 1

I have a file that I have tried transferring across the wired LAN via both scp and rsync, and both have yielded the same result. When I run du file on the file after the transfer, the file is 8 bytes larger on the recipient host.

I have also checked head file | hexdump -C on both hosts, and they are identical. Same story for tail...

Any ideas why this might be happening? If it matters, the file is a gzip.

ssh
Martin Hope
Ian Ling
Asked: 2015-09-11 10:14:14 +0800 CST
  • 1

On host 'abc' I run:

iperf -s -w 256k

On host 'xyz' I run:

iperf -c -w 256k

And I get 900Mb. When I reverse the commands, making 'abc' the client, I get 200Mb. This means that abc's upload speed maxes at 200Mb.

There are no devices between these hosts, and they have no firewalls or rate limiting of any kind in place. They both have 1Gb ethernet ports.

Running iftop on abc shows very little Tx activity (so there isn't anything being uploaded). These are Debian hosts. Any ideas?

iperf