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[Discuss] Verizon blacklisted me

Looks like I was right.

See, Verizon uses Google Apps for mail for business class FiOS. Earlier
today, Google made a change that caused ALL mail being sent by users
with periods in their login names (like mine) to fail with an
authentication error. So, if your account is something like
"Daniel.Barrett" then you've been getting 550/5.7.1 authentication
failures for a good portion of the day.

Google seems to have identified the problem and is pushing fixes as I
try to send this.

Rich P.

On Wed, Aug 6, 2014 at 12:38 PM, Daniel Barrett <dbarrett at>

> Last week without warning, all my outgoing FIOS email started getting
> rejected by Verizon's SMTP server,, with this error:
>   500 5.7.0 Unknown AUTH error -1 (Internal authentication error)
> I looked up "500 5.7.0," and it means my IP address has been
> blacklisted. (For no reason that I can imagine.) No client changes
> happened on my end to cause this.
> Has anyone else ever experienced this and gotten it fixed? The Verizon
> support people I've spoken with don't seem to have the knowledge to
> understand a server-side problem like this. They keep asking if I can
> log into their webmail server, what my Outlook settings are,
> etc. Eventually they check with some mysterious "email server team,"
> who claims my IP address is not blacklisted... and yet
> is giving me the above SMTP error "500 5.7.0" every
> time.
> In the meantime, I have signed up with a different outgoing email
> provider, which is why I could send this note. :-)
> Thanks for any tips...!
> --
> Dan Barrett
> dbarrett at
> _______________________________________________
> Discuss mailing list
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