When you buy bitcoin, do you receive the private key by mail?

I am very confused about how you get your private key and how you can transfer it

iPhone: I can't receive calls on my Mac even though I logged in with the same Apple ID on all devices

I noticed that I cannot receive phone calls from my iPhone (6S, iOS 13.3.1) on my Mac (OS Mojave, 10.14.6). After looking for this problem, I was referred to the settings menu of my iPhone in settings -> Phone -> allow calls from other devices. This toggle was disabled, but when I tried to click on it, I received a system popup telling me that all services: iCloud, Facetime should be connected with the same Apple ID.

I double checked and saw that both services: iCloud and facetime are connected with the same Apple ID on both devices.

Has anyone addressed this issue before?

I can't receive tweets but I can send them

For the past 3 days I have not been able to see the responses to my tweets. I cannot interact with my followers. I can send tweets but my followers do not receive them or do not receive them. I can't see your answers. Help because Twitter has not. My account is not blocked or suspended.

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  1. mariofernando44
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Receive 150, 100 or 50 euros. To do this, you need to guess the Btc rate

Contest: Receive 150, 100 or 50 EUR. To do this, you need to guess the Bitcoin rate more accurately and republish!

Competition conditions:
https://www.facebook.com/Xmlgold/posts/3034120559951832?__tn__=K-R

1) The winners will be those that indicate with greater precision and before the Bitcoin exchange rate that will be on March 28, 2020 at 12.00 (GMT time) on exchangebitfinex.com.
The exchange rate can be verified at the exchange rate bitfinex.comor on our website https://www.xmlgold.eu/or through the service https://www.tradingview.com/chart/
Prizes will be paid in bitcoins at the exchange rate at the time the competition ends (on March 28, 2020 at 12.00 GMT)

two) You must:
a ) Subscribe to the xmlgold.eu Facebook page: https://www.facebook.com/Xmlgold/
b) In the comment, write a forecast for the rate.
C) Re-post this adt.

3) Each participant can make a single forecast (but can delete the previous comment and leave a new one). If the participant leaves several predictions, only the first of them participates in the event, the rest will be ignored.

4) If two users make the same forecast, the winner will be the one who left their forecast before.

5) If the potential winner does not republish on the page at the time of the summary, victory is awarded to the next participant in turn.

6) To be a winner, your page must be open (accessible for all users to see) during the period between March 27, 2020 and March 29, 2020. The original message must be republished. You are not allowed to republish an individual image, a normal group link, or simply copied text.

7) Accounts with low activity may not become winners of the competition, and victory will be awarded to the next participant in turn. Minimum criteria for the winner: the total number of friends and subscribers is at least 30; the profile microblog (on the wall) must contain at least one entry older than 1 month, different from other forwarding competitions; there must be at least one image in the profile picture established before March 1, 2020

8) Forecasts accepted until March 27, 2020 at 12:00 (GMT time), all forecasts made afterwards will not be taken into account and will be deleted by the moderator.

XMLGold is a digital currency and electronic currency exchange company. Confident since 2006!
With XMLGold.eu, you can always instantly exchange the following:
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Is there a payment provider to send and receive cryptocurrencies? (Market Place)

My apologies if this is not an issue, but I'm not sure where else to ask. Is there a payment provider that not only allows you to receive money but also allows you to send money? Looking at the Coinbase Commerce API, this doesn't seem to be possible.

I couldn't find something that would allow me, p. create a wallet for my users and send them money like in a market.

Linux: Why can't I reliably send or receive data over TCP after moving servers?

I am currently dealing with a network problem on high latency internet links (100-400 ms). I ran a Minecraft network, and recently moved it to a separate data center to get a server with a better CPU and more RAM. The users of this server are spread all over the world. Before the change, the server was in Montreal and users in Europe had a latency of ~ 100-200ms, and those in Australia had a latency of ~ 200-300ms. After the change, the server is in Germany, users in North America get a latency of ~ 100-200 ms, and users in South America and Australia get a latency of 200-400 ms. Overall, the latency is pretty similar, but who gets excellent latency and who gets tolerable latency varies (note that Minecraft isn't very latency-sensitive overall, especially compared to most video games). There is also no significant packet loss, as measured by the MTR and ping tools. Also, the software on both servers is almost identical. Both servers are running Debian 10, and I checked all the software + settings that are not in the APT repositories to send, while reinstalling the exact same packages via apt. As such, the software configuration must be essentially identical.

However, many users have connection problems. It appears to only occur around 6:00 PM (± a few hours) in the eastern United States. The connection problem specifically takes the nature of the performance of all TCP connections to be appallingly low. With an SSH + SOCKS proxy, it took minutes Loading a normal web page (Gmail), and in-game, it often takes minutes even a simple chat message to arrive if a few MB of global data is transferred. The effective latency of a TCP connection (for example, the time it takes for a chat message to pass through it) increases unreasonably massively when data is placed on that TCP connection. A normal SSH session with only one terminal is basically fine, and the game is fine overall if not much is happening, but as soon as something of significant size is sent over TCP and is during the time mentioned above then performance it breaks and the latency over TCP (but not through ping) becomes irrational, even several minutes in the worst cases. When this problem first occurred, there was a significant packet loss (~ 25%) which I thought was to blame, but that packet loss no longer occurs (according to ping etc.) but the problem persists. The packet loss, but not the troublesome symptoms, disappeared after I made a general report to the new host about the packet loss, but before I could give them more detailed data with MTR as requested in their response to that report. My impression of the host is that nothing was changed, but who really knows.

As such, at this point, I suspect that the relevant difference between servers is that the previous host (OVH) performs some kind of tweaking of their operating system images (something I know to be the case), and that the new host ( Hetnzer) no.

I suspect this setting has something to do with the size of the TCP window, but when I tried to manipulate those settings to make changes, the settings didn't seem to do what they were supposed to. Specifically, when I configure the various net.ipv4.mem or net.core.mem settings i find listed on the internet via sysctl, the size of the window that iperf select (or the maximum that is allowed to select, when using the -w option) seems to take a random value with no discernible relationship to me with the values ​​I configured via sysctl, rather than behaving the way I expected, where its maximum value is simply what I configured via sysctl. Note that iperf -s It misbehaves even before a client connects to it, so not making the same changes on the client is not a plausible explanation.

As such, I wonder 2 things:

1) How can I repair my server and allow the latency on TCP connections to be similar to the actual latency on the link, even at peak times and under moderate load (a few mbps)?

2) How can I reliably and predictably change the TCP window size of all applications? (Or equivalently, what's going on with the sysctl setting being applied in seemingly random ways? What's the pattern I'm missing?)

Contest: Receive 150, 100 or 50 EUR. To do this, you need to guess the BTC rate

Contest: Receive 150, 100 or 50 EUR. To do this, you need to guess the Bitcoin rate more accurately and republish!

Competition conditions:
https://www.facebook.com/Xmlgold/posts/3034120559951832?__tn__=K-R

1) The winners will be those that indicate with greater precision and before the Bitcoin exchange rate that will be on March 28, 2020 at 12.00 (GMT time) on exchangebitfinex.com.
The exchange rate can be verified at the exchange rate bitfinex.comor on our website xmlgold.euor through the service https://www.tradingview.com/chart/

Prizes will be paid in bitcoins at the exchange rate at the time the competition ends (on March 28, 2020 at 12.00 GMT)

two) You must:

a) Subscribe to the xmlgold.eu Facebook page: https://www.facebook.com/Xmlgold/

yes) In the comment, write a forecast for the rate.

C) Re-post this adt.

3) Each participant can make a single forecast (but can delete the previous comment and leave a new one). If the participant leaves several predictions, only the first of them participates in the event, the rest will be ignored.

4) If two users make the same forecast, the winner will be the one who left their forecast before.

5) If the potential winner does not republish on the page at the time of the summary, victory is awarded to the next participant in turn.

6) To be a winner, your page must be open (accessible for all users to see) during the period between March 27, 2020 and March 29, 2020. The original message must be republished. You are not allowed to republish an individual image, a normal group link, or simply copied text.

7) Accounts with low activity may not become winners of the competition, and victory will be awarded to the next participant in turn. Minimum criteria for the winner: the total number of friends and subscribers is at least 30; the profile microblog (on the wall) must contain at least one entry older than 1 month, different from other forwarding competitions; there must be at least one image in the profile picture established before March 1, 2020

😎 Predictions are accepted until March 27, 2020 at 12:00 (GMT time), all predictions made afterwards will not be taken into account and will be deleted by the moderator.

Cannot receive postfix, dovecot + spamassassin emails

I have been trying to install postfix, dovecot and spamassassin setup.
But I got caught up in this problem. Sending mail is possible, but receiving email
is what doesn't work I will receive an "Undelivered Mail Returned to Sender" email when I try.
the error in this email is

: user unknown. Command output:
    lda(sidboy55555@syntexhosting.nl,)Error:
    net_connect_unix(/var/run/dovecot/stats-writer) failed: Permission denied

I already tried putting this in my dovecot.conf

service stats {
  unix_listener stats-writer {
    user = mail dovecot postfix debian-spamd **tried it all!**
    group = mail dovecot postfix debian-spamd **tried it all!**
    mode = 0660
  }
}

My main.cf:
https://pastebin.com/h3wFjbne

My master.cf:
https://pastebin.com/Tq57MhRs

My dovecot.conf:
https://pastebin.com/gp10xKs1

My mail.info:
https://pastebin.com/PZwvyPMR

My mail.log:
https://pastebin.com/n9EwvuLu

My syslog:
https://pastebin.com/9A616ifn