Thank you very much! Any more ideas on how to validate the email
address existence.
On Oct 12, 12:38 am, Freddy Andersen <[EMAIL PROTECTED]> wrote:
> Do you have this user registered at your site with an email address?
>
> There is no way to "test" a existing email with ex. google or other
> email hosts. (The smtp protocol allows for this but its a spam trap to
> have this available... )
>
> You do have the ability to test if the domain exists and is a valid
> domain.. But again this can't be 100% because not all servers allow
> this inquiry and your connection to them might timeout
>
> This would validate the domain (but could fail if you timeout.. ):
>
> require 'resolv'
> def validate
> unless errors.on(:email)
> unless valid_domain?(email)
> logger.debug "[DEBUG] - Domain name #{email} has a problem."
> errors.add(:email, 'domain name appers to be incorrect')
> end
> end
> end
>
> def valid_domain?(email)
> domain = email.match(EMAIL_PATTERN)[2]
> dns = Resolv::DNS.new
> Timeout::timeout(SERVER_TIMEOUT) do
>
> # Check the MX record
> mx_records = dns.getresources(domain,
> Resolv::DNS::Resource::IN::MX)
>
> mx_records.sort_by {|mx| mx.preference}.each do |mx|
> a_records = dns.getresources(mx.exchange.to_s,
> Resolv::DNS::Resource::IN::A)
> return true if a_records.any?
> end
>
> #Try a straight A record
> a_records = dns.getresources(domain, Resolv::DNS::Resource::IN::A)
> a_records.any?
> end
> rescue Timeout::Error, Errno::ECONNREFUSED
> false
> end
>
> Using a pattern is faster and just plain easier...
>
> EMAIL_PATTERN = /\A([EMAIL PROTECTED])@((?:[-a-z0-9]+\.)+[a-z]{2,})\Z/i
> validates_format_of :email, :with => EMAIL_PATTERN
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