Summary
Finding a direct postmaster contact at Terra.com.br is challenging, with contact forms being the primary recommendation. Addressing throttling involves various strategies: MTA configuration for slower sending, queueing systems, dedicated IP warmup, adhering to sending limits, monitoring sending reputation, practicing list hygiene, and using tools. Understanding SMTP error codes and platform-specific throttling policies is also crucial.
Key findings
- Terra.com.br Contacts: Direct contacts are scarce; rely on contact forms.
- MTA Configuration: Configuring MTA for slower sending helps with Terra.com.br.
- Queueing Systems: Queueing can manage sending rates to avoid throttling.
- IP Warmup: Dedicated IP warmup improves reputation, reducing throttling.
- Sending Limits: Adhere to recommended sending limits.
- Reputation Monitoring: Monitor sending reputation using available tools.
- List Hygiene: Clean lists and engage subscribers to mitigate throttling.
- SMTP Error Codes: SMTP error codes signal throttling; handle them programmatically.
- Platform Policies: Understand platform-specific throttling policies (Exchange Online, AWS SES).
- PowerMTA Configuration: PowerMTA allows configuring throttling based on various parameters.
Key considerations
- Contact Form Reliance: Ensure forms are functional and monitored.
- MTA Configuration: Properly configure MTA throttling settings.
- Bounce Monitoring: Monitor bounce messages to address deliverability issues.
- IP Warmup Process: Warm up IPs gradually.
- Engagement Focus: Prioritize list hygiene and engagement.
- Tool Investment: Invest in sending reputation monitoring tools.
- Error Code Implementation: Implement programmatic handling of error codes.
- Policy Awareness: Stay updated on platform throttling policies.
- PowerMTA Configuration: Customize PowerMTA throttling.
- Quota Management: Request and monitor AWS SES sending quotas.
- Sudden Spikes: Avoid sudden email volume spikes.
- SPF/DKIM Records: Review your SPF/DKIM records.
- Permission Passes: Implement permission passes.
What email marketers say
9 marketer opinions
Finding a direct postmaster contact at Terra.com.br can be challenging, with contact forms being the primary recommended method. Addressing throttling issues involves various strategies, including implementing queueing systems, warming up dedicated IPs, adhering to sending limits, monitoring sending reputation, and practicing good list hygiene.
Key opinions
- Contact Forms: Terra.com.br primarily uses contact forms for postmaster inquiries.
- MTA Configuration: Slowing down sending rates through MTA configuration is a potential solution for throttling with Terra.com.br.
- Queueing System: Implementing a queueing system can help manage sending rates and avoid throttling.
- Dedicated IP: Using and warming up a dedicated IP address can improve sending reputation and reduce throttling.
- Sending Limits: Adhering to recommended sending limits is crucial to avoid triggering throttling mechanisms.
- Reputation Monitoring: Monitoring sending reputation and adjusting sending rates based on feedback loops is important.
- List Segmentation: Segmenting email lists and sending to engaged users first can improve deliverability.
Key considerations
- Form Availability: Ensure the contact forms on Terra.com.br are functional and monitored.
- MTA Adjustments: Understand and properly configure MTA settings for throttling if needed.
- Bounce Monitoring: Monitor bounce messages to identify and address deliverability issues.
- IP Warmup: Gradually warm up a dedicated IP address to establish a positive sending reputation.
- Engagement: Focus on sending to engaged users and cleaning inactive subscribers.
- Tools: Investigate tools to monitor sending reputation.
- Sudden Spikes: Avoid sudden spikes in sending volume.
Marketer view
Email marketer from Litmus recommends monitoring your sending reputation and avoiding sudden spikes in email volume. They also suggest segmenting your email list and sending to the most engaged users first.
2 Dec 2023 - Litmus
Marketer view
Marketer from Email Geeks explains that while they don't have contacts there anymore the links provided by Brian should work. They also mention it's been a while they don't have issues there but it should work... it is throttling, and for them they had to put a mta configuration to send slower than big MBPs...
27 Jun 2021 - Email Geeks
What the experts say
2 expert opinions
Finding direct postmaster contacts is increasingly difficult, making contact forms and published policies the primary resources. To address throttling, focusing on list hygiene, engagement, and permission passes is recommended.
Key opinions
- Contact Methods: Direct postmaster contacts are hard to find; use contact forms or check policies.
- List Hygiene: Maintaining a clean and engaged list is key to mitigating throttling.
Key considerations
- Form Reliance: Rely on contact forms provided by ISPs for communication.
- Engagement Focus: Prioritize list hygiene and engagement strategies to reduce throttling impact.
- Permission Passes: Implement permission passes to ensure subscribers want to receive emails.
Expert view
Expert from Spam Resource explains that finding direct postmaster contacts is becoming increasingly difficult. The best approach is often to use the contact forms provided on the ISP's website or to check their published policies.
23 Jun 2024 - Spam Resource
Expert view
Expert from Word to the Wise advises focusing on list hygiene and engagement to mitigate throttling issues. She suggests cleaning inactive subscribers and segmenting lists. Also working on permission passes to prove users want emails from you.
30 Aug 2022 - Word to the Wise
What the documentation says
4 technical articles
SMTP servers use error codes to signal throttling. Platforms like Exchange Online and AWS SES have throttling policies and limits. PowerMTA offers configurable throttling and monitoring options.
Key findings
- SMTP Error Codes: SMTP servers use error codes (e.g., 421) to indicate throttling.
- Platform Policies: Exchange Online and AWS SES implement specific throttling policies.
- PowerMTA Configuration: PowerMTA allows configurable throttling based on various parameters.
Key considerations
- Error Code Handling: Implement programmatic handling of SMTP error codes for retries.
- Platform Limits: Understand and adhere to throttling policies of email platforms.
- PowerMTA Settings: Configure PowerMTA's throttling based on domain, IP, and time.
- Quota Management: Request and monitor AWS SES sending quotas.
Technical article
Documentation from RFC 5321 explains that SMTP servers use error codes like 421 to indicate temporary throttling issues. This documentation explains these codes can be used programmatically to handle and retry sending emails later.
27 Nov 2022 - RFC 5321
Technical article
Documentation from Microsoft Docs explains how Exchange Online implements throttling to protect the service. It details the various throttling policies and their limits, giving insight into how Microsoft manages email flow.
7 Jan 2023 - Microsoft Docs
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