[notes] opentimestamps.org python client

[Karl]

>> Is mailchuck.com working for you?  It went down for me some years ago,
>> haven't seen it since.
>
> I recently created an account and it was working for me, but I have not
> paid in BTC for that account, for sending messages.

So you are not having this experience?  This has been the past few years for me:

$ curl -v https://mailchuck.com/
*   Trying 85.25.152.9:443...
* connect to 85.25.152.9 port 443 failed: Connection refused
*   Trying 85.114.135.102:443...
* connect to 85.114.135.102 port 443 failed: Connection refused
* Failed to connect to mailchuck.com port 443 after 287 ms: Connection refused
* Closing connection 0
curl: (7) Failed to connect to mailchuck.com port 443 after 287 ms:
Connection refused
$ curl -v http://mailchuck.com/
*   Trying 85.25.152.9:80...
* connect to 85.25.152.9 port 80 failed: Connection refused
*   Trying 85.114.135.102:80...
* connect to 85.114.135.102 port 80 failed: Connection refused
* Failed to connect to mailchuck.com port 80 after 303 ms: Connection refused
* Closing connection 0
curl: (7) Failed to connect to mailchuck.com port 80 after 303 ms:
Connection refused