Support of User/ Email address with 3 dots after @

Hello,

currently we use libcurl 7.71.0.
Does libcurl support email addresses like firstname.name_at_part1.part2.part3.com<mailto:firstname.name_at_part1.part2.part3.com> ?

We have a communication library with following code snipped which worked fine so far:
      if (m_curl)
      {
        CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_USERNAME, m_username.c_str());
        CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_PASSWORD, m_password.c_str());
        if (m_ssl == SendHelper::SSLConnection::SSL_ENABLED)
        {
          CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_URL, std::string{ "pop3s://" + m_server }.c_str());
          const auto result = CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_USE_SSL, CURLUSESSL_ALL);
          if (result != CURLE_OK)
          {
            LOG4CXX_ERROR(m_logger, "Using SSL/TLS while opening mailbox failed: " << curl_easy_strerror(result));
            throw MailboxOpenException(result, curl_easy_strerror(result));
          }
        }
        else
        {
          CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_URL, std::string{ "pop3://" + m_server }.c_str());
          CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_USE_SSL, CURLUSESSL_NONE);
        }
        auto listingWriter = CurlWriter{};
        CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_WRITEFUNCTION, curlWriteCallback);
        CurlUtilities::curl_easy_setopt(m_logger, m_curl, CURLOPT_WRITEDATA, (void*)&listingWriter);

        const auto result = curl_easy_perform(m_curl);

        if (result != CURLE_OK)
        {
          LOG4CXX_ERROR(m_logger, "Listing of mailbox contents failed: " << curl_easy_strerror(result));
          throw MailboxOpenException(result, curl_easy_strerror(result));
        }

When we use an email (with 3 dots after @) like the one above we get the error message "Listing of mailbox contents failed:
So far we could not reproduce this behaviour because the email was used by a customer. Before, the customer used an email with 2 dots after @ and it worked. But since the customer changed to the new email address it is not possible to open the mailbox.

Any suggestions?

regards
Mr. Knud Pehrs

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Received on 2020-08-25