What is some bad email deliverability advice?

Summary

The collective advice underscores numerous detrimental practices affecting email deliverability, categorized across list management, sending practices, and technical implementations. Buying lists, neglecting list hygiene, and failing to obtain explicit consent are consistently flagged as harmful. Incorrect technical setups, such as improper authentication, sudden volume spikes, and invalid formatting, also significantly impact deliverability. Furthermore, ignoring feedback loops, blocklists, and employing deceptive content tactics (misleading subject lines, hidden unsubscribe links) contribute to poor sender reputation and increased spam filtering. Ultimately, a proactive, ethical, and technically sound approach is essential for optimal email deliverability.

Key findings

  • List Management: Purchasing email lists and neglecting list cleaning (removing bounces, unengaged users) directly harms deliverability due to spam complaints and invalid addresses.
  • Consent: Sending unsolicited emails significantly increases the likelihood of being flagged as spam and damages sender reputation.
  • Authentication & Tech: Failure to implement proper authentication (SPF, DKIM, DMARC), sending emails with incorrect formatting, and neglecting IP warm-up severely impact deliverability.
  • Feedback Monitoring: Ignoring feedback loops from ISPs and failing to monitor blocklists results in poor sender reputation and reduced inbox placement.
  • Deceptive Tactics: Misleading subject lines, hidden unsubscribe links, and using lookalike domains trigger spam filters and erode trust with recipients.
  • Reliance on Quick Fixes: Switching ESPs upon IP blocking without addressing underlying issues is a temporary solution, not a long-term fix.
  • Shared Responsibility Misconception: Assuming ESPs alone are responsible for deliverability can lead to neglect of crucial sender-side best practices.

Key considerations

  • Prioritize Permission: Always obtain explicit consent (opt-in) from subscribers before sending any email communication.
  • Maintain List Health: Implement rigorous list hygiene practices, including regular cleaning to remove invalid addresses and unengaged subscribers.
  • Implement Full Authentication: Configure SPF, DKIM, and DMARC to authenticate your sending domain and improve deliverability.
  • Warm-up New IPs: Gradually increase sending volume over time when using new IP addresses to establish a positive sender reputation.
  • Monitor Feedback & Reputation: Actively monitor feedback loops, blocklists, and sender reputation metrics to identify and address deliverability problems promptly.
  • Transparency and Honesty: Use clear, honest subject lines and make the unsubscribe process easy and transparent.
  • Take Proactive Ownership: Take ownership of your deliverability practices, understanding that you play a critical role alongside your ESP.
  • Adhere to RFC Standards: Emails adhere to RFC standards and any changes to formats should be closely reviewed prior to implementation to ensure no compliance issues.

What email marketers say
32Marketer opinions

The provided answers highlight numerous examples of bad email deliverability advice. These range from technical errors, such as neglecting email authentication and using invalid email formatting, to poor list management practices like buying email lists and sending to unengaged users. Other common mistakes include using misleading subject lines, ignoring complaint feedback loops, and failing to monitor blocklists. A recurring theme is the importance of obtaining explicit consent, maintaining a clean email list, and managing sender reputation proactively.

Key opinions

  • List Hygiene: Buying email lists or failing to clean existing lists leads to deliverability issues due to spam complaints and invalid addresses.
  • Permission: Sending emails without explicit consent damages sender reputation and increases the likelihood of being marked as spam.
  • Authentication: Neglecting email authentication protocols (SPF, DKIM, DMARC) makes emails appear suspicious, negatively impacting deliverability.
  • Sending Volume: Sending high email volumes from new accounts or without warming up can trigger spam filters.
  • Misleading Tactics: Using misleading subject lines or hiding unsubscribe links harms sender reputation and increases spam complaints.
  • Feedback Loops: Ignoring complaint feedback loops and blocklists prevents identifying and addressing deliverability problems.
  • Content: Using spam trigger words in email content reduces the chances of the email reaching the intended recipient.

Key considerations

  • Obtain Consent: Always obtain explicit consent from recipients before sending emails to comply with anti-spam laws and maintain a positive sender reputation.
  • Maintain List Hygiene: Regularly clean your email list to remove invalid addresses and unengaged subscribers to minimize bounce rates and spam complaints.
  • Implement Authentication: Implement SPF, DKIM, and DMARC to authenticate your emails and improve deliverability by verifying your identity to email providers.
  • Monitor Reputation: Actively monitor your sender reputation and address any issues promptly to maintain good deliverability rates.
  • Provide Clear Unsubscribe: Always include a clear and easily accessible unsubscribe link to allow recipients to opt out and reduce spam complaints.
  • Test and Monitor: Consistently test email deliverability, check for spam trigger words and ensure a clear process for complaints or unsubscribes are adhered to.
Marketer view

Email marketer from Active Campaign shares that not including a clear unsubscribe link in your emails will lead to higher spam complaints and will negatively affect your sender reputation.

July 2023 - Active Campaign
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "You can buy lists as long as you send an opt out pass first so that anybody who doesn't want your content can just excuse themselves!"

March 2022 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Most people will click every link in your email just to check what you’re advertising, so make sure to put a LOT of white space between the end of your email, and the footer area where your unsubscribe link is so that fewer people click the unsubscribe link. Everyone one your list obviously wants to receive your messages and don’t want to accidentally click the unsubscribe link."

August 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Losing too many subscribers to your required unsubscribe link? Just make it the same color as your background. Adios, pesky opt-outs!"

October 2022 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "When people unsubscribe. Email them from your personal address to see if they still want the offers anyway."

October 2024 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Nah, just ask your ESP for all new IPs. If they won't do it, then switch ESPs."

August 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "When AWS tells you not to conflate Opt In origin, explain that your privacy policy states that recipients opt in to all domains in your network giving you the permission to spam as needed. Promptly get booted from AWS for not adhering to policies."

August 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Protect your brand and domain and use a lookalike domain."

November 2022 - Email Geeks
Marketer view

Email marketer from Hubspot shares that failing to check for spam trigger words in your email message might cause spam filters to pick it up and ruin your chances of reaching potential customers.

April 2022 - Hubspot
Marketer view

Email marketer from Reddit shares that using URL shorteners excessively can flag your emails as spam, especially if the shortener is associated with malicious activity.

March 2021 - Reddit
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Testing is important - let's just create a fake list of thousands of @abc.com addresses, for sure that must be a fake domain :tired_face:"

August 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Warmup is for small brands, for folks who are weak. You have a big brand, you are strong - everyone knows you & your brand - blast to everyone everyday. The more you send, the more you can make money! Money is in the list :aw_yeah:"

April 2022 - Email Geeks
Marketer view

Email marketer from Email Marketing Forum shares that using misleading or deceptive subject lines to trick recipients into opening emails harms sender reputation and deliverability.

March 2023 - Email Marketing Forum
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "What do you mean people, from a list I bought, didn’t actually open my email? “Insert ESP name here” shows 150% open rates!…."

October 2024 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "inboxing is down, time for a new IP!!"

July 2021 - Email Geeks
Marketer view

Email marketer from Sendinblue Blog explains that sending emails to people who haven't explicitly opted in is harmful. It leads to spam complaints and damages sender reputation, decreasing deliverability rates.

April 2024 - Sendinblue Blog
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Put your DKIM signature at the bottom of every e-mail."

December 2022 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Include non-engaged with your messages in order to keep complaint rates low relative to total sent. When the traffic is in the inbox, too many people report spam..."

February 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "I heard plain text emails deliver better than HTML messages so I only send text content in an HTML mime type...."

September 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Peak is coming, make sure you mail to everyone on your list that hasn’t bounced or unsubscribed. With online shopping the focus of spending, it’s important that everyone know you are having those special sales! And make sure you keep it timely to really add urgency so send it all out at once. When they don’t engage, mail again!"

October 2022 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Send content that you're just *sure* people want, whether they asked for it or not."

December 2023 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Need more engagement volume? Retry to your list of sunset/unengaged 180+ day list, you're sure to get opens and clicks if you have a snappy subject line!"

September 2022 - Email Geeks
Marketer view

Email marketer from Gmass shares that sending a high volume of emails through a new account is going to immediately trigger all the spam filters and you may be locked out of your account.

March 2022 - Gmass
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Only spammers end up in the spam folder so you don't need to worry about that. Send to everybody on your list all the time!"

June 2023 - Email Geeks
Marketer view

Email marketer from Reddit shares that neglecting email authentication (SPF, DKIM, DMARC) is bad advice because it makes your emails appear suspicious, leading to deliverability issues.

July 2024 - Reddit
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Institute the strictest dmarc policy possible immediately (and without testing of course) for *max* deliverability. Goodbye junk folder, hello conversions."

January 2022 - Email Geeks
Marketer view

Email marketer from Email Marketing Forum shares that using a shared IP for high-volume sending without proper reputation management is a mistake, since other users' actions can negatively affect your deliverability.

January 2022 - Email Marketing Forum
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "If you don't have enough subscribers, you can just buy a list or add all of your personal contacts--everyone loves email!"

July 2023 - Email Geeks
Marketer view

Email marketer from Mailjet Blog explains that buying email lists is a bad practice. It violates anti-spam laws, damages sender reputation, and often contains outdated or invalid addresses.

March 2021 - Mailjet Blog
Marketer view

Email marketer from ZeroBounce Blog explains that failing to regularly clean your email list is detrimental. This results in high bounce rates, spam complaints, and ultimately, poor deliverability.

May 2021 - ZeroBounce Blog
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Email is very unreliable. If you don't get engagement within four hours of a send, re-send to those who didn't engage so it hopefully gets through on the second send."

February 2024 - Email Geeks
Marketer view

Marketer from Email Geeks shares bad deliverability advice: "Purchased lists must work. I get tons of spam!"

November 2022 - Email Geeks

What the experts say
6Expert opinions

The provided expert advice highlights several pitfalls in email deliverability strategies. These include ineffective suppression strategies (focusing solely on non-clickers), relying on quick fixes like switching ESPs for blocked IPs, and using outdated or risky techniques like hash busting. Additionally, neglecting feedback loops from ISPs, assuming deliverability is solely the ESP's responsibility, and failing to manage email lists properly (including handling bounces and removing inactive subscribers) are detrimental to email deliverability.

Key opinions

  • Suppression Strategies: Prioritizing the suppression of non-clickers over non-openers is not an effective deliverability strategy.
  • Switching ESPs as a Solution: Switching ESPs immediately after IP blocking is a temporary solution that does not address the underlying deliverability issues.
  • Hash Busting: Using hash busting techniques is an outdated practice that can harm deliverability and sender reputation.
  • Ignoring Feedback Loops: Neglecting complaint feedback loops from ISPs prevents senders from identifying and addressing deliverability problems effectively.
  • Shared Responsibility: Assuming deliverability is solely the ESP's responsibility leads to neglect of essential sender-side practices.
  • List Management Neglect: Failing to manage email lists properly, including handling bounces and removing inactive subscribers, harms deliverability.

Key considerations

  • Refine Suppression: Develop refined suppression strategies based on both open and click data to improve engagement metrics.
  • Address Root Causes: Instead of switching ESPs immediately, address the root causes of IP blocking to improve sender reputation and prevent future issues.
  • Avoid Outdated Techniques: Avoid using outdated and risky techniques like hash busting, which can negatively impact deliverability.
  • Monitor Feedback Loops: Actively monitor complaint feedback loops from ISPs to identify and remove users complaining about your emails.
  • Take Ownership: Take ownership of your deliverability by actively managing your sending practices and reputation.
  • Maintain List Health: Regularly clean your email lists by removing inactive subscribers and handling bounces to improve deliverability.
Expert view

Expert from Email Geeks shares bad deliverability advice: "Suppressing non-clickers is even more effective at improving delivery metrics than suppressing non-openers."

February 2024 - Email Geeks
Expert view

Expert from Spam Resource explains that ignoring complaint feedback loops from ISPs is bad deliverability advice. Complaint feedback loops allow you to remove users complaining and improve deliverability.

May 2024 - Spam Resource
Expert view

Expert from Spam Resource explains that assuming deliverability is solely your ESP's responsibility is bad deliverability advice. Senders must actively manage their reputation and practices to ensure good deliverability.

November 2022 - Spam Resource
Expert view

Expert from Email Geeks shares bad deliverability advice: "Using hash busting (long hidden text parts in your email) as a tool to get out of the promotions tab. Maybe include text from the Bible or your favourite book."

May 2022 - Email Geeks
Expert view

Expert Laura Atkins from Word to the Wise explains that bad deliverability advice is neglecting proper list management, including removing inactive subscribers and managing bounces.

August 2022 - Word to the Wise
Expert view

Expert from Email Geeks shares bad deliverability advice: "IPs blocked? Just switch ESPs to get unblocked."

December 2021 - Email Geeks

What the documentation says
4Technical articles

The provided documentation highlights critical technical aspects affecting email deliverability. Drastic changes in sending volume without proper IP warm-up can trigger spam filters. Ignoring feedback loops (FBLs) prevents identifying and addressing spam complaints. Invalid email formatting and headers violate standards, leading to deliverability issues. Failing to monitor blocklists results in a poor IP and domain reputation, harming overall deliverability. All these factors contribute to decreased inbox placement and sender reputation.

Key findings

  • Volume Spikes: Drastically changing sending volumes without warming up IPs can trigger spam filters.
  • Feedback Loop Neglect: Failing to monitor and act on feedback loops prevents identifying and addressing spam complaints.
  • Format Violations: Sending emails with improperly formatted headers or invalid email addresses negatively impacts deliverability.
  • Blocklist Ignorance: Failing to monitor blocklists results in poor IP and domain reputation.

Key considerations

  • Warm-up IP: Gradually increase sending volume when using new IP addresses to establish a positive sender reputation.
  • Monitor FBLs: Actively monitor and respond to feedback loops to identify and remove spam complainers from your list.
  • Adhere to Standards: Ensure all emails adhere to RFC standards for formatting and validation of email addresses.
  • Monitor Blocklists: Regularly check if your IP address or domain is on any blocklists and take steps to get removed if necessary.
Technical article

Documentation from RFC explains that sending emails with improperly formatted headers or invalid email addresses can negatively impact deliverability. Adhering to email standards is crucial for avoiding spam filters.

March 2024 - RFC
Technical article

Documentation from Sparkpost shares that failing to monitor blocklists results in poor IP and domain reputation which hurts your overall email deliverability.

May 2021 - Sparkpost
Technical article

Documentation from Microsoft explains that failing to monitor and act upon feedback loops (FBLs) is a critical error. FBLs provide information about spam complaints, allowing senders to remove problematic subscribers and improve deliverability.

September 2024 - Microsoft
Technical article

Documentation from Google explains that drastically changing sending volumes without warming up IP addresses can trigger spam filters. Gradual increases are recommended to establish a positive sender reputation.

July 2023 - Google