Net::SMTPFatalError: 550 5.7.1 Unconfigured Sending Domain <mapzen.com>

[drewda]

https://sentry.io/transitland/transitland-datastore/issues/491307750/

Net::SMTPFatalError: 550 5.7.1 Unconfigured Sending Domain <mapzen.com>

  net/smtp.rb:965:in `check_response'
    raise res.exception_class, res.message
  net/smtp.rb:919:in `data'
    check_response res
  net/smtp.rb:664:in `block in send_message'
    rcptto_list(to_addrs) {data msgstr}
  net/smtp.rb:859:in `rcptto_list'
    ret = yield
  net/smtp.rb:664:in `send_message'
    rcptto_list(to_addrs) {data msgstr}
...
(50 additional frame(s) were not displayed)

550 5.7.1 Unconfigured Sending Domain <mapzen.com>