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How to check if an email address exists without sending an email?
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Not really.....Some server may not check the "rcpt to:"
http://www.freesoft.org/CIE/RFC/1123/92.htm
Doing so is security risk.....
If the server do, you can write a bot to discovery every address on the server....
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git push says “everything up-to-date” even though I have local changes
...ch-name"? Ps: You are soooo right about newcomers.
– www-0av-Com
Jan 2 '18 at 23:36
@user1863152 that's the name of th...
How to import an existing X.509 certificate and private key in Java keystore to use in SSL?
...# Create PKCS#12 file to import using keytool later
# ----
# From https://www.sslshopper.com/ssl-converter.html:
# The PKCS#12 or PFX format is a binary format for storing the server certificate,
# any intermediate certificates, and the private key in one encryptable file. PFX
# files usually have ...
Install go with brew, and running the gotour
...th=\"50\" height=\"18\" viewBox=\"0 0 50 18\" fill=\"none\" xmlns=\"http://www.w3.org/2000/svg\"\u003e\u003cpath d=\"M46.1709 9.17788C46.1709 8.26454 46.2665 7.94324 47.1084 7.58816C47.4091 7.46349 47.7169 7.36433 48.0099 7.26993C48.9099 6.97997 49.672 6.73443 49.672 5.93063C49.672 5.22043 48.9832 4...
Does Python have a package/module management system?
...tps://rubygems.org/gems/rails RubyGems page for the package rails
https://www.npmjs.org/package/express Npm page for the package express
https://pypi.python.org/pypi/simplejson/ PyPI page for the package simplejson
You'll see the RubyGems and Npm pages both begin with a one-line description of th...
HTML 5: Is it , , or ?
...as HTML and fail on <br/> but not <br />
Reference:
http://www.w3schools.com/tags/tag_br.asp
http://en.wikipedia.org/wiki/XHTML
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What is the official “preferred” way to install pip and virtualenv systemwide?
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http://www.pip-installer.org/en/latest/installing.html is really the canonical answer to this question.
Specifically, the systemwide instructions are:
$ curl -O http://python-distribute.org/distribute_setup.py
$ python distribute_...
In log4j, does checking isDebugEnabled before logging improve performance?
...pleted avoided by using Simple Logging Facade for Java or (SLF4J) - http://www.slf4j.org/manual.html . This allows method calls such as:
logger.debug("Temperature set to {}. Old temperature was {}.", t, oldT);
This will only convert the passed in parameters to strings if debug is enabled. SLF4J a...
Eclipse interface icons very small on high resolution screen in Windows 8.1
...on I thought I'd add that this issue is solved in Eclipse 4.6 Neon https://www.eclipse.org/downloads/index-developer.php (the current developer version).
The icons look a bit sad (low resolution) but at least they are scaled correctly on my 4k screen.
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How to urlencode data for curl command?
... Doesn't work for curl --data-urlencode "description=" www.example.com. Any idea why? `
– Khurshid Alam
Jun 3 '16 at 20:37
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