Because many SMTP servers requires TLS 1.2 encryption now. To send email with TLS 1.2 on Windows XP, you can enable TLS 1.2 like this:
Put the following POSReady text (omit the hyphen lines) in POSReady.txt, rename to POSReady.reg, right-click Merge, Yes
You can also download it from:
POSReady.regCode:
Windows Registry Editor Version 5.00
[HKEY_LOCAL_MACHINE\SYSTEM\WPA\PosReady]
"Installed"=dword:00000001
After you merge POSReady.reg, please download:
https://www.catalog.update.microsoft.com/search.aspx?q=kb4019276Find POSReady, Windows XP Embedded versions of KB4019276
Click Download button for that version.
Goto
https://www.catalog.update.microsoft.com/search.aspx?q=KB4230450 Find POSReady, Windows XP Embedded versions of KB4230450:
Click Download button for that version.
For each KB file: click, accept install, reboot.
After navigating the chain of registry keys, click the key TLS1.1, in the right panel, right-click "OSVersion", click Modify, enter the Value data shown above, click OK. (you must change "3.6.1.0.0" to "3.5.1.0.0")
Code:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\AdvancedOptions\CRYPTO\TLS1.1]
"OSVersion"="3.5.1.0.0"
9C) Next click the key TLS1.2, in the right panel, right-click "OSVersion", click Modify, enter the Value data shown above, click OK. (you must change "3.6.1.0.0" to "3.5.1.0.0")
Code:
[HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Internet Explorer\AdvancedOptions\CRYPTO\TLS1.2]
"OSVersion"="3.5.1.0.0"
In my test, you can send email with TLS 1.2 on Windows XP now.However, if it is failed, please add the following registry
Code:
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Client]
"DisabledByDefault"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.1\Server]
"DisabledByDefault"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client]
"DisabledByDefault"=dword:00000000
[HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Server]
"DisabledByDefault"=dword:00000000
If you used Webbrowser control + OAUTH, you must enable TLS 1.2 in IE8:Download and install:
https://www.catalog.update.microsoft.com/Search.aspx?q=KB4316682Download and install:
Cumulative Security Update for Internet Explorer 8 for WES09 and POSReady 2009 (KB4230450)
https://www.catalog.update.microsoft.com/search.aspx?q=KB4230450Open IE8, click Tools, Internet Options, Advanced tab, pull the thumb bar all the way down. You should see new checkbox options for "Use TLS 1.1", "Use TLS 1.2". (KB4230450 will install these checkboxes, but they won't work without KB4019276.)
11) Uncheck "Use TLS 1.0" (insecure). Leave unchecked "Use TLS 1.1" (already obsolete). Check "Use TLS 1.2". Click OK.
