maennchen/email_checker

Elixir library checking email validity based on Regex, MX and SMTP

email_checker's Issues

Most of the domains are not working.

What's happening

Hi. i was trying this cool module but most of the domains (gmail, yahoo, outlook) are failing for some reason.
i tried debugging my self but couldn't get to the point of where might be wrong.
one thing i tried is telnetting to gmail

telnet gmail-smtp-in.l.google.com 25      
Trying 2404:6800:4008:c07::1a...
Connection failed: Permission denied
Trying 64.233.189.26...
telnet: Unable to connect to remote host: No route to host

Any suggestions? Thanks.

Edit:
Sorry i didn't read correctly the readme page which says
Most email providers nowadays don't support this method. You should only use it if you know what you're doing.

Is there any alternative way to do this?..

Error when running EmailChecker.valid?

I get this error when using EmailChecker.valid?:

     ** (FunctionClauseError) no function clause matching in Kernel.=~/2
     stacktrace:
       (elixir) lib/kernel.ex:1580: Kernel.=~(nil, ~r/^(?<user>[^\s]+)@(?<domain>[^\s]+\.[^\s]+)$/)
       lib/email_checker.ex:28: EmailChecker.valid?/2```

Fix compile warning

Pretty trivial, not worth the hoops of a clone/push/pr.

Warning on compile on lib/email_checker/check/smtp.ex:28 is:

warning: function head for def valid?/2 must come at the top of its direct implementation.

Patch to fix:

diff --git a/lib/email_checker/check/smtp.ex b/lib/email_checker/check/smtp.ex
index 063fb34..914f92f 100644
--- a/lib/email_checker/check/smtp.ex
+++ b/lib/email_checker/check/smtp.ex
@@ -25,7 +25,6 @@ defmodule EmailChecker.Check.SMTP do
   """
   @spec valid?(String.t(), non_neg_integer) :: boolean
   def valid?(email, retries \\ max_retries())
-  def valid?(email, retries)
   def valid?(_, 0), do: false

   def valid?(email, retries) do

Error when enabling SMTP

** (UndefinedFunctionError) function Socket.TCP.connect!/3 is undefined (module Socket.TCP is not available)
    Socket.TCP.connect!("gmail-smtp-in.l.google.com", 25, [packet: :line, timeout: :infinity])
    (email_checker 0.2.4) lib/email_checker/check/smtp.ex:66: EmailChecker.Check.SMTP.smtp_reply/1
    (email_checker 0.2.4) lib/email_checker/check/smtp.ex:32: EmailChecker.Check.SMTP.valid?/2

Some domains don't work

It works properly for some domain names but not all of them. For example, no hotmail.com email addresses are valid.