Summary
Following the acquisition of Roadrunner by Time Warner and subsequently by Charter, all Roadrunner and Time Warner Cable email services are now fully integrated under Spectrum's infrastructure. This means that for any postmaster-related inquiries, including understanding email error codes, accessing guidelines, or troubleshooting deliverability issues for @rr.com or @twc.com addresses, senders must consult Spectrum's official postmaster site. Much of the specific Roadrunner Postmaster content has disappeared, and historical information may no longer be relevant to current Spectrum systems, though some archived resources still exist for historical context.
Key findings
- Merger Impact: Roadrunner and Time Warner Cable email services are entirely managed by Spectrum, encompassing all legacy @rr.com and @twc.com addresses.
- Spectrum as Primary Source: The Spectrum Postmaster site is the official and primary resource for guidelines, best practices for bulk emailing, and a comprehensive list of common email error codes relevant to all its managed domains.
- Obsolete Roadrunner Information: Most original Roadrunner Postmaster content has disappeared, and applying old Roadrunner rejection messages to current Spectrum Mail Transfer Agents (MTAs) is not advised.
- Limited Public Detail: Despite a large internal email team, public-facing information regarding specific Roadrunner postmaster details from Spectrum is notably limited.
- Historical Access: An archived version of the old Roadrunner Postmaster site can be accessed via Archive.org for historical reference, though its content is generally outdated for current deliverability needs.
Key considerations
- Consult Spectrum Postmaster: Always refer to the Spectrum Postmaster site for current official guidelines, policies, and error code explanations for all Spectrum-managed domains, including legacy Roadrunner addresses.
- Adhere to Best Practices: Ensure strong IP and domain reputation by consistently applying general email best practices, such as warming up IPs, authenticating emails with SPF, DKIM, and DMARC, and maintaining clean, engaged subscriber lists.
- Treat Legacy Domains as Spectrum: When validating email lists or troubleshooting, treat all @rr.com and @twc.com addresses as Spectrum addresses, as they operate under Spectrum's mail servers and policies.
- Monitor Deliverability Metrics: Actively monitor bounce rates, engagement metrics, and check for IP blacklisting to ensure effective deliverability to Spectrum, which now serves a vast user base from acquired domains.
- Caution with Outdated Info: Be wary of relying on unofficial or outdated information regarding Roadrunner or Time Warner Cable errors and contacts, as much of the old infrastructure has been disabled and may no longer be accurate.
What email marketers say
14 marketer opinions
Following the integration of Roadrunner and Time Warner Cable under Charter Spectrum, the consolidated entity now centrally manages all email services for legacy @rr.com and @twc.com domains. Consequently, all inquiries regarding postmaster details, email error codes, and deliverability guidelines for these addresses must be directed to Spectrum's official postmaster resources. While some historical Roadrunner information exists, it is largely outdated and no longer relevant for current Spectrum systems, emphasizing the need for senders to rely solely on Spectrum's published policies and support channels.
Key opinions
- Spectrum's Central Management: All legacy Roadrunner and Time Warner Cable email addresses are now exclusively managed by Spectrum's mail servers and policies post-merger.
- Authoritative Source: Spectrum's postmaster site serves as the definitive source for email guidelines, bulk sending policies, and error code explanations relevant to all its domains.
- Outdated Legacy Data: Much of the specific Roadrunner Postmaster content has disappeared, and any available historical information may be outdated and inaccurate for current Spectrum operations.
- Limited Public Information: Despite Spectrum's significant email team, there is limited publicly available detailed postmaster information specifically addressing the legacy Roadrunner domains.
- Importance of Reputation: Maintaining a strong IP and domain reputation is crucial for successful email delivery to Spectrum's extensive user base, which includes millions of former Roadrunner and TWC accounts.
Key considerations
- Direct All Queries to Spectrum: For any deliverability issues or postmaster-related questions concerning @rr.com or @twc.com addresses, engage with Spectrum's official support and postmaster site.
- Adhere to Best Practices: Implement and consistently follow general email best practices, including robust authentication (SPF, DKIM, DMARC), proper IP warming, and diligent list hygiene to ensure optimal deliverability.
- Monitor Performance Metrics: Regularly monitor bounce rates, engagement levels, and check for IP blacklisting, as these factors significantly impact deliverability to Spectrum's network.
- Treat Legacy Domains as Spectrum: Consider all legacy Roadrunner and TWC email addresses as Spectrum-managed when validating lists or configuring sending infrastructure.
- Beware of Unofficial Information: Exercise caution with unofficial or potentially outdated resources regarding Roadrunner or Time Warner Cable specific error codes and contacts, as they may not reflect current Spectrum system behavior.
Marketer view
Marketer from Email Geeks confirms that most of the useful Roadrunner Postmaster content disappeared following the merger with Charter/Spectrum.
1 Sep 2023 - Email Geeks
Marketer view
Marketer from Email Geeks states that despite Spectrum having a large email team, there is limited public information available regarding Roadrunner postmaster details.
25 May 2025 - Email Geeks
What the experts say
3 expert opinions
For users seeking postmaster information or error codes related to legacy Roadrunner accounts, the critical takeaway is that these services are now managed by Spectrum following a series of corporate mergers. While the original Roadrunner Postmaster site is defunct, the current Spectrum Postmaster site provides limited granular detail regarding specific rejection codes or direct contact avenues for email professionals. Senders should refrain from applying outdated Roadrunner error messages, as the underlying infrastructure has changed significantly, making current Spectrum resources the only reliable source, albeit one that may lack comprehensive public-facing information.
Key opinions
- Post-Merger Authority: Spectrum now exclusively handles all postmaster inquiries for legacy Roadrunner accounts after successive acquisitions.
- Information Scarcity: The current Spectrum Postmaster site offers minimal detail regarding specific rejection codes or direct contact pathways for email deliverability issues.
- Irrelevance of Old Data: Past Roadrunner rejection messages and infrastructure details are no longer applicable to current Spectrum Mail Transfer Agents (MTAs) and should not be used.
- Limited Transparency: Spectrum does not appear to publicly share comprehensive details about its email error codes or specific postmaster contact information.
- Historical Resource: An archived version of the original Roadrunner Postmaster site is available on Archive.org for historical context, but its content is largely outdated for current operations.
Key considerations
- Focus on Spectrum: For any deliverability or error code questions concerning former Roadrunner domains, direct all inquiries and troubleshooting efforts towards Spectrum's existing postmaster resources.
- Avoid Outdated References: Do not attempt to interpret current email rejection messages from Spectrum MTAs using old Roadrunner error codes or documentation, as the underlying systems have significantly changed.
- Acknowledge Information Gaps: Be aware that public-facing documentation from Spectrum regarding detailed email error codes or specific contact information for deliverability issues may be limited.
- Utilize General Resources: In the absence of specific Spectrum error code documentation, general SMTP field manuals or crowdsourced deliverability resources may offer broader insights, though they might not contain Roadrunner-specific data.
- Prioritize Current System Behavior: Always prioritize understanding how Spectrum's current email infrastructure behaves rather than relying on historical information from the pre-merger Roadrunner era.
Expert view
Expert from Email Geeks explains that Roadrunner was acquired by Time Warner, which was then bought by Charter, meaning users now deal with Spectrum for postmaster-related inquiries.
22 Jan 2023 - Email Geeks
Expert view
Expert from Email Geeks explains that the old Roadrunner Postmaster site is no longer available and the current Spectrum postmaster site lacks useful information for email professionals, such as rejection codes or contact pathways. She advises caution against applying old Roadrunner rejection messages to current Spectrum MTAs, as much of the old infrastructure was disabled. She notes that Spectrum does not seem to share this information and mentions the SMTP Field Manual as a crowdsourced resource, though it may not contain Roadrunner specific data.
3 May 2022 - Email Geeks
What the documentation says
4 technical articles
With Roadrunner and other legacy email services now fully integrated under Spectrum's infrastructure, email senders have a clear, unified resource for all deliverability inquiries. The Spectrum Postmaster site is the definitive hub, offering official guidelines, best practices for bulk sending, and a crucial comprehensive list of common email error codes. Additionally, Spectrum's general support provides current email settings and troubleshooting for all associated domains. To ensure successful delivery, senders must prioritize adherence to Spectrum's authentication standards, including robust SPF, DKIM, and DMARC records, as these are critical for meeting the ISP's requirements.
Key findings
- Unified Postmaster Site: The Spectrum Postmaster site is the primary and official resource for all Spectrum-managed email domains, encompassing guidelines, best practices for bulk emailing, and support for deliverability issues, including those affecting legacy Roadrunner addresses.
- Centralized Error Codes: A comprehensive list of common email error codes and their explanations, crucial for troubleshooting bounce-back messages, is available directly on the Spectrum Postmaster site for both Spectrum and legacy Roadrunner email addresses.
- Spectrum Controls Legacy Services: All email services previously associated with Roadrunner, Time Warner Cable, and Bright House Networks domains are now entirely managed under Spectrum's infrastructure, centralizing current email settings and server information.
- Authentication Alignment: Email security solutions from third-party providers like Mimecast acknowledge and align with the deliverability requirements of major ISPs, including Spectrum, by emphasizing proper SPF, DKIM, and DMARC records for domains, including legacy Roadrunner.
Key considerations
- Consult Spectrum's Official Sites: For current guidelines, best practices, and troubleshooting for all Spectrum-managed email domains, including legacy Roadrunner addresses, always refer to the official Spectrum Postmaster site and Spectrum Support documentation.
- Leverage Error Code Resources: Utilize the comprehensive list of common email error codes provided on the Spectrum Postmaster site to effectively diagnose and resolve bounce-back messages when sending to Spectrum or former Roadrunner email addresses.
- Confirm Spectrum Management: Understand that all former Roadrunner, Time Warner Cable, and Bright House Networks email services are now fully integrated and managed under Spectrum's infrastructure, meaning all related settings and policies are Spectrum's.
- Prioritize Authentication Standards: Implement and maintain proper email authentication, including SPF, DKIM, and DMARC records, as these align with Spectrum's deliverability requirements and are crucial for successful email delivery.
- Address General Troubleshooting: In addition to specific postmaster resources, leverage general email troubleshooting steps and current email settings found via Spectrum Support for comprehensive deliverability management.
Technical article
Documentation from Spectrum Postmaster Site explains that senders can find official guidelines, best practices for bulk emailing, and resources for deliverability issues directly on the Spectrum Postmaster site. This site is the primary resource for all Spectrum-managed email domains, including legacy Roadrunner addresses.
16 Feb 2023 - Spectrum Postmaster Site
Technical article
Documentation from Spectrum Postmaster Site shares a comprehensive list of common email error codes and their explanations, which is crucial for troubleshooting bounce-back messages when sending to Spectrum or legacy Roadrunner email addresses. This resource helps senders understand why their emails might not be delivered.
28 May 2024 - Spectrum Postmaster Site
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