Valid google emails marked as invalid about email_address HOT 4 CLOSED

This is working properly for me now. It sounds like your DNS wasn't properly responding, which would explain the long time for response and and the returned errors.

It could also have been a DNS issue at google not returning the correct information. While I have not heard of a recent Google outage, the recent Facebook outage left clients repeatedly hitting public DNS servers like Google's 4.4.4.4 and 8.8.8.8, causing them to suffer service degradation.

Is this still happening? Are you using the most recent version?

We want to use DNS to validate domains as a step to ensure a valid email address, but if you give the host_validation: :syntax option, it will skip it, as you tried.

There is a configuration dns_timeout which takes the number of seconds to timeout. Currently, this is not set by the library, but perhaps should be. (See Resolv::DNS.timeout=)

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It's still happening on my end today using 0.2.0 and after updating to 0.2.1.

One thing I forgot to mention: it's not consistent. Sometimes validating a Google managed address succeeds; sometimes it fails on the first attempt; sometimes on the second attempt; sometimes on the 8th attempt etc.

I saw dns_timeout is included in EmailAddress::Config.all_settings
But when I try running:

EmailAddress::Config.setting(:dns_timeout, 5000)
EmailAddress.valid?('[email protected]')

or

EmailAddress.valid?('[email protected]', dns_timeout: 5000)

...it does not reduce the time to fail. Do I need to set it via a different method (using Resolv::DNS)?

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The timeout value is in seconds, so try something like 5 instead.

As far as the the inconsistency of validations, it sounds like your DNS service, otherwise other people would be raising this issue as well. Can you change your DNS to use Google (https://developers.google.com/speed/public-dns/docs/using) or Cloudflare (https://beebom.com/how-switch-to-cloudflares-1-1-1-1-dns/) and see if it solves your issue?

from email_address.

Thanks for correcting me on the timeout value - I'm too used to using milliseconds in Javascript!

And for the info on how to change DNS service.

In the end I have just worked around the issue by skipping the DNS check in development:

EmailAddress.valid?(params[:email], Rails.env.development? ? {host_validation: :syntax} : {})

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