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Postings by Eliza

about MTA's 4xx response code

I know postfix returns 4xx Response Code for Temporarily Deferred, as below:

[Status: Error, Address: < ... at chinabuckets dot com>, ResponseCode 421, 4.7.0
Temporarily Deferred]

Message will be retried for 4 more day(s)

I don't like every MTA returns this 4xx code, that would make the
incoming messages delay a lot time.

How do you think of this? should RFC reconsider to disable 4xx code?

regards.

lxcfs info

Hi,

When running 'pstree' I see a line which shows:

├─lxcfs───10*[{lxcfs}]

Do you know what is lxcfs and how it influence the OS?

I am running ubuntu 18.04:

$ uname -a
Linux ubuntu-18.04 4.15.0-47-generic #50-Ubuntu SMP Wed Mar 13 10:44:52
UTC 2019 x86_64 x86_64 x86_64 GNU/Linux

thanks in advance.

postfix with JMAP

Hi,

will postfix get JMAP compatible in future?
see: <a href="https://jmap.io/" title="https://jmap.io/">https://jmap.io/</a>

thanks.

postfix with AWS S3

Hello,

Does postfix have a plugin who can be integrated with AWS's S3 as object
storage? Coz for a large email service, the local disks are too limited.

thanks & regards,
Eliza

default outgoing encoding

Hi,

if MUA lacks to set encoding, where for postfix to setup the default
content encoding (for example, utf8) for outgoing messages?

thanks

SSL communication between MTAs

Hello,

My MTA (postfix) has both 25 (non-SSL) and 465 (SSL) ports enabled.

How to enforce the peer MTA send messages only to 465 port for better
secure communication?

Can I just shutdown port 25?

Thanks.

ruby for machine learning

Hi,

I mostly do programming with ruby/perl/c, but machine learning seems to
use python primarily.
what's the suggested framework for ruby user to use machine learning stuff?

thanks.

Unsubscribe: <mailto:ruby-talk-request@ruby-lang.org?subject=unsubscribe>
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apt and apt-get

Hi,

I am running ubuntu-18.04, which has both apt and apt-get for package
management.

$ apt-get -v
apt 1.6.10 (amd64)

$ apt -v
apt 1.6.10 (amd64)

Are these two programs the same one? which is suggested?

Thanks.

Linux Journal says goodbye

from their website:

"On August 7, 2019, Linux Journal shut its doors for good. All staff
were laid off and the company is left with no operating funds to
continue in any capacity. The website will continue to stay up for the
next few weeks, hopefully longer for archival purposes if we can make it
happen.
–Linux Journal, LLC"

I just feel sorry about that.

regards.

add swap to cloud host (KVM)

Hi,

I have two cloud hosts both which are ubuntu, one has swap enabled:

$ free -m
total used free shared buff/cache
available
Mem: 991 88 233 29 670
684
Swap: 974 136 838

Another has none:

$ free -m
total used free shared buff/cache
available
Mem: 985 423 171 26 390
391
Swap: 0 0 0

So how to add swap to the system?

Thanks.

resolv.conf questions

Hello,

After installing ubuntu-18.04 I found there are the lines in
/etc/resolv.conf:

nameserver 127.0.0.53
options edns0

I am not familiar with Linux enough, having questions that:

why does nameserver set up to this address rather than a public DNS such
as 8.8.8.8?

How to disable it?

what is options edns0?

Thanks.