Summary
To achieve optimal email deliverability to Polish providers like Interia and minimize throttling, a multifaceted approach is essential. Start by establishing a good sender reputation, which involves adhering to volume limits (beginning around 1,000 messages per day and incrementally increasing by 12% every 2-3 days, monitoring for blocks), proper email authentication (SPF, DKIM, and DMARC), and maintaining a clean and engaged email list. Be aware of potential pay-to-play models with Polish providers. Monitor your sender reputation through tools like Postmaster Tools, avoid spam triggers in your email content, and ensure you have explicit consent from recipients. Warm up new IP addresses gradually, segment your email lists for more targeted sends, and proactively check for blacklisting. Consider that European providers often throttle more aggressively, so domain alignment and adherence to their specific guidelines are crucial. Finally, implement feedback loops and regularly review sending practices to adapt to changing ISP requirements.
Key findings
- Volume Management: Gradual volume increase is key; starting low (around 1,000 emails/day) and increasing by 12% every 2-3 days, while monitoring for blocks.
- Authentication is Crucial: SPF, DKIM, and DMARC are non-negotiable for verifying sender legitimacy and preventing spoofing.
- Sender Reputation Matters: ISPs heavily rely on sender reputation to determine deliverability; a poor reputation will lead to throttling or blocking.
- List Hygiene is Essential: Regularly cleaning your email list to remove inactive or invalid addresses minimizes bounce rates and improves deliverability.
- European ISPs are Strict: European ISPs often have stricter throttling policies, so domain alignment (CNAMEs), authentication, and monitoring are even more critical.
Key considerations
- Pay-to-Play Models: Be aware of the potential for pay-to-play models with Polish providers, as these can impact deliverability and may require budget allocation.
- IP Warm-Up: If using new IP addresses, warm them up gradually to establish a positive sender reputation.
- Segmented Sending: Segment your lists to target specific audiences and send relevant content, improving engagement and reducing spam complaints.
- Avoid Spam Triggers: Carefully craft email content to avoid spam trigger words and phrases that can lead to filtering.
- Monitor Blacklists: Regularly check your IP address and domain against blacklists to identify and address any reputation issues promptly.
- Get Consent: Ensure you have explicit consent from recipients before sending emails to comply with regulations and improve engagement.
- Feedback Loops: Implement feedback loops to monitor complaints and improve sending practices.
- Monitor Performance: Continuously monitor email performance and adjust your strategies accordingly.
What email marketers say
11 marketer opinions
To effectively send emails to Polish providers like Interia and avoid throttling, it's crucial to manage your sending reputation and adhere to specific volume guidelines. Starting with a low volume of around 1,000 messages per day and gradually increasing by 12% every 2-3 days is advised. Authentication (SPF, DKIM, DMARC) is vital, as is list hygiene, and monitoring your sender reputation. Additionally, Polish providers may have a pay-to-play model. Warming up your IP address, segmenting your lists, avoiding spam trigger words, and ensuring recipients add you to their address book are also important.
Key opinions
- Volume limits: Start with low sending volumes (around 1,000 messages/day) and increase gradually to avoid triggering throttling mechanisms.
- Authentication: Properly authenticate your emails using SPF, DKIM, and DMARC to prove your legitimacy to email providers.
- Pay-to-play: Be aware that some Polish providers may have a pay-to-play model that can impact deliverability.
- Segmentation: Segment your email lists to send more targeted and relevant content to smaller groups of recipients, improving engagement.
- Sender Reputation: Focus on improving and maintaining sender reputation with ISPs, as this will severely affect your email deliverability.
Key considerations
- IP Warmup: If using a new IP address, gradually warm it up by increasing sending volume over time to establish a positive reputation.
- List Hygiene: Regularly clean your email lists to remove invalid or inactive addresses, reducing bounce rates and improving engagement.
- Blacklist Monitoring: Monitor your IP address and domain for blacklisting to address any reputation issues promptly.
- Content Quality: Avoid using spam trigger words and create valuable, engaging content that encourages recipients to add you to their address book.
- Consent: Ensure that you have explicit consent from recipients before sending emails, reducing the risk of spam complaints.
- Provider Guidelines: Research and understand specific guidelines from Polish providers like Interia, as European providers tend to throttle more aggressively and prefer authentication/domain alignment
Marketer view
Email marketer from MailerCheck explains that email throttling is a process by which a mail service provider (MSP) like Gmail, Outlook, or Yahoo! intentionally slows down the rate at which it accepts email from a particular sender. They recommend improving sender reputation, using dedicated IP address and warming it up, authenticating email and cleaning email list.
28 Oct 2024 - MailerCheck
Marketer view
Email marketer from Omnisend notes that, when sending emails, ISPs and email providers scan them for spam triggers to determine if they should deliver the message, filter it, or reject it altogether. They suggest cleaning your email lists, getting consent, writing a great subject line and properly authenticating to avoid spam filters.
28 Aug 2024 - Omnisend
What the experts say
2 expert opinions
Maintaining a positive sender reputation is critical for avoiding email throttling by Polish providers like Interia. Throttling occurs when ISPs delay or refuse messages due to suspected spam-like activity or high volume. Experts recommend authentication, list segmentation, content creation, and volume monitoring to maintain a good sender reputation.
Key opinions
- Sender Reputation: A poor sender reputation significantly impacts email deliverability, leading to throttling and potential blocking of messages.
- Throttling Triggers: ISPs throttle emails based on perceived spam-like behavior, which includes high sending volume or content that triggers spam filters.
- Proactive Measures: Implementing best practices in authentication, list hygiene, and content creation can improve sender reputation and prevent throttling.
Key considerations
- Authentication: Ensure proper email authentication methods are in place (SPF, DKIM, DMARC) to verify the legitimacy of your messages.
- List Segmentation: Segment email lists to send targeted and relevant content to specific groups, reducing the likelihood of spam complaints.
- Content Quality: Create high-quality, engaging content that avoids spam trigger words and provides value to recipients.
- Volume Monitoring: Monitor email sending volumes and adjust as necessary to avoid exceeding the thresholds set by ISPs.
Expert view
Expert from Spamresource explains the importance of sender reputation when sending emails. They note that having a poor sender reputation will severely affect your email deliverability. They recommend implementing best practices in authentication, list hygiene, and content creation.
20 Dec 2024 - Spamresource
Expert view
Expert from Word to the Wise explains that throttling happens when an ISP temporarily delays or refuses to accept messages from an IP or domain. This is often due to perceived spam-like behavior or high volume. They recommend maintaining a good sending reputation by authenticating, segmenting lists, and monitoring volume.
2 May 2022 - Word to the Wise
What the documentation says
4 technical articles
To ensure email deliverability, especially with providers like Gmail and, by extension, Polish providers using similar protocols, it's crucial to implement robust authentication methods (SPF, DKIM, and DMARC). SPF allows domain owners to specify authorized mail servers, DKIM signs messages for verification, and DMARC dictates how receivers should handle authentication failures while providing reporting. Maintaining consistent sending volumes, avoiding unwanted mail, and monitoring sender reputation using tools like Postmaster Tools are also essential. For marketing emails, including a List-Unsubscribe header is a best practice.
Key findings
- Authentication Importance: SPF, DKIM, and DMARC are critical for authenticating emails, ensuring they are delivered and not marked as spam.
- Sender Policy Framework (SPF): SPF records allow domain owners to specify authorized mail servers, enabling receivers to verify the email's origin.
- DomainKeys Identified Mail (DKIM): DKIM provides a digital signature that verifies the message's integrity and authenticity.
- DMARC Enforcement: DMARC builds on SPF and DKIM by instructing receivers on how to handle authentication failures and providing reporting mechanisms.
- Volume Consistency: Maintaining consistent sending volumes helps establish trust with email providers and reduces the likelihood of throttling or spam classification.
Key considerations
- SPF Record Setup: Accurately configure SPF records to list all authorized sending IP addresses and domains.
- DKIM Key Management: Properly generate, store, and manage DKIM private keys, ensuring they are securely implemented on sending servers.
- DMARC Policy Configuration: Carefully configure DMARC policies to dictate how receivers handle authentication failures (e.g., reject, quarantine) and set up reporting to monitor results.
- Gmail Guidelines: Follow Gmail's sender guidelines, including sending wanted mail and providing a List-Unsubscribe header for marketing emails.
- Reputation Monitoring: Use tools like Gmail's Postmaster Tools to monitor your sender reputation and address any deliverability issues proactively.
Technical article
Documentation from RFC-Editor explains that DMARC (Domain-based Message Authentication, Reporting & Conformance) builds upon SPF and DKIM to provide a way for domain owners to specify how receiving mail servers should handle messages that fail authentication checks. DMARC also provides a reporting mechanism that allows domain owners to receive feedback about authentication results.
25 Nov 2022 - RFC-Editor
Technical article
Documentation from Gmail Help explains that to ensure Gmail delivers your messages, authenticate your email with SPF, DKIM, and DMARC. Send consistent volume. Avoid sending unwanted mail. Monitor your sender reputation in Postmaster Tools. Follow Gmail's sender guidelines. If you send marketing emails, use the List-Unsubscribe header.
1 Jun 2024 - Gmail Help
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