Are Bitly links bad for email deliverability?

Summary

The overwhelming consensus is that using Bitly links and other generic URL shorteners can negatively impact email deliverability. While they offer some tracking benefits, they are commonly associated with spam and phishing, leading to decreased trust, potential blacklisting, and increased likelihood of emails being flagged as spam. Experts and marketers generally advise against using them, recommending full URLs, branded short links, or UTM parameters for tracking to maintain a positive sender reputation and ensure reliable delivery. In cases where ad sales vendors insist on using Bitly, it may indicate a lack of responsibility for deliverability issues.

Key findings

  • Spam Association: Bitly links are frequently used in spam and phishing emails, making them less trustworthy to spam filters.
  • Decreased Trust: URL shorteners can decrease trust with recipients and are often flagged by spam filters.
  • Deliverability Issues: Using Bitly links can result in emails landing in the spam folder or being rejected by recipient servers.
  • Reputation Damage: Link shorteners can be detrimental to your sender reputation and overall email deliverability.
  • Limited Effectiveness: Using Bitly links to avoid email clipping in Gmail is unlikely to be effective, as ESPs often wrap them in longer hashed links.
  • Tracking Alternative: UTM parameters offer a viable alternative for tracking without compromising deliverability.

Key considerations

  • Full URLs: Prioritize using full, original URLs to maintain trust and avoid triggering spam filters.
  • Branded Short Links: Consider using branded short links on your own domain for greater control over reputation and deliverability.
  • UTM Parameters: Implement UTM parameters to track campaign performance without relying on URL shorteners.
  • Vendor Responsibility: If ad sales vendors insist on using Bitly, ensure they understand and accept responsibility for any resulting deliverability issues.
  • Self-Hosting: Explore self-hosting a URL shortening service on your own domain for increased control and brand consistency.
  • Caution with Shorteners: Use short URLs with extreme caution, relying only on trusted services.

What email marketers say
14Marketer opinions

The consensus is that Bitly links and other URL shorteners can negatively impact email deliverability. While they offer tracking capabilities, their association with spam and potential for abuse can lead to emails being flagged as spam or rejected by recipient servers. Experts and marketers recommend using full URLs, branded short links, or UTM parameters for tracking to maintain a positive sender reputation and ensure reliable delivery.

Key opinions

  • Spam Association: Bitly links are commonly used by spammers, leading to deliverability issues and potential blacklisting.
  • Decreased Trust: URL shorteners can decrease trust with recipients and may be flagged by spam filters.
  • Negative Impact: URL shorteners can negatively impact sender reputation and deliverability.
  • Deliverability Harm: URL Shorteners can harm deliverability despite them providing tracking capabilities

Key considerations

  • Full URLs: Using full URLs can improve trust and avoid spam filters.
  • Branded Short Links: Consider using branded short links on your own domain for better control and reputation.
  • UTM Parameters: Use UTM parameters for tracking instead of shortening links.
  • Alternative Solutions: Explore alternative solutions for shortening and tracking URLs, such as self-hosting or branded links.
Marketer view

Marketer from Email Geeks shares that Bitly links are very commonly used by spammers which implies they could hurt deliverability.

October 2024 - Email Geeks
Marketer view

Marketer from Email Geeks recounts a client who asked to use Bitly to shorten URLs because emails were being clipped. They refused to use Bitly but found another solution for long redirects.

November 2024 - Email Geeks
Marketer view

Marketer from Email Geeks explains they've seen deliverability issues when bit.ly links were included and that the mail was often rejected because it was found on various blocklists.

January 2025 - Email Geeks
Marketer view

Email marketer from Reddit explains that using Bitly links can sometimes cause emails to land in the spam folder. They suggest using full URLs or a custom short domain instead.

October 2021 - Reddit
Marketer view

Email marketer from Email Marketing Forum explains that using URL shorteners can lead to spam flagging. They prefer using branded shortened URLs on a dedicated domain for better control.

April 2021 - Email Marketing Forum
Marketer view

Email marketer from SuperOffice suggests to avoid URL shorteners like bit.ly. They explain that these can be added to blocklists which will negatively impact email deliverability.

April 2022 - SuperOffice
Marketer view

Email marketer from StackExchange explains that using URL shorteners can decrease trust and may be flagged by spam filters. They advise against using them in promotional emails.

October 2022 - StackExchange
Marketer view

Email marketer from EmailToolTester shares that while URL shorteners provide tracking, they can harm deliverability. They recommend using branded short links or full URLs instead.

September 2023 - EmailToolTester
Marketer view

Email marketer from HubSpot Blog shares that while URL shorteners were popular for tracking, their use can hurt deliverability. They suggest using UTM parameters for tracking instead of shortening links.

April 2022 - HubSpot Blog
Marketer view

Marketer from Email Geeks suggests self-hosting a shortened URL on your own sending domain as an alternative and to 'roll your own'.

May 2021 - Email Geeks
Marketer view

Email marketer from Litmus shares that while tracking is important, using URL shorteners can jeopardize deliverability. They suggest using UTM parameters for tracking while maintaining full URLs.

January 2023 - Litmus
Marketer view

Email marketer from Reddit shares that they avoid using URL shorteners in newsletters due to deliverability concerns. They prefer using full URLs with clear tracking parameters.

July 2021 - Reddit
Marketer view

Email marketer from Sendinblue advises against using generic URL shorteners like Bitly because spammers often abuse them. This can negatively affect the sender's reputation and deliverability.

August 2023 - Sendinblue
Marketer view

Email marketer from Neil Patel's Blog explains that URL shorteners like Bitly can negatively impact email deliverability. He advises against using them because they can be flagged as spam.

April 2022 - Neil Patel's Blog

What the experts say
6Expert opinions

While Bitly links offer click tracking, their use can be problematic for email deliverability. Ad sales vendors may use them to circumvent tracking issues or long URLs, but this can shift responsibility for deliverability issues to the sender. Experts warn that Bitly links are often associated with spam and phishing, making them less trustworthy to spam filters. Additionally, using Bitly to avoid email clipping in Gmail is ineffective. While not always harmful, short URLs can obfuscate the destination and be used maliciously, necessitating caution and the use of trusted shortening services.

Key opinions

  • Tracking Benefit: Bitly links provide click tracking and reporting capabilities.
  • Vendor Solution: Ad sales vendors may use Bitly to address tracking issues with their ad platforms.
  • Shifting Responsibility: Insisting on Bitly links can mean the ad sales vendor is not responsible for deliverability issues.
  • Spam Association: Link shorteners are often used in spam and phishing emails, making them less trustworthy.
  • Ineffective Clipping Fix: Using Bitly to avoid email clipping in Gmail is unlikely to work.
  • Obfuscation Risk: Short URLs can obfuscate the destination and be used maliciously.

Key considerations

  • Branded Links: Ad sales vendors should consider paying for branded links instead of relying on Bitly.
  • Actual Links: Consider using the actual link instead of a shortened link for increased trustworthiness.
  • Trusted Services: If using short URLs, use only trusted shortening services.
  • Caution: Exercise caution when using short URLs due to potential deliverability impacts.
Expert view

Expert from Email Geeks explains that ad sales vendors likely use URLs that break or don't track well from email due to some ad platform, and one solution is to use Bitly links. They suggest the vendor should pay for a branded link and not be spammers.

April 2022 - Email Geeks
Expert view

Expert from Word to the Wise mentions that while not always harmful, short URLs can impact deliverability because they obfuscate the destination and can be used maliciously. They suggest only using trusted shortening services and advise caution.

May 2023 - Word to the Wise
Expert view

Expert from Email Geeks explains that using Bitly to avoid clipped emails in Gmail is unlikely to work because the ESP will wrap the Bitly link in a longer hashed link. There is also the small risk of something egregious happening and bit.ly being shut down.

July 2021 - Email Geeks
Expert view

Expert from SpamResource explains that using link shorteners can be problematic because they are often used in spam and phishing emails. This makes them less trustworthy to spam filters. They recommend using the actual link instead of a shortened link.

March 2021 - SpamResource
Expert view

Expert from Email Geeks shares that if the ad sales insist on Bitly links, the underlying message is that they are not responsible for any delivery problems and will not pay for any mail that is blocked.

March 2023 - Email Geeks
Expert view

Expert from Email Geeks explains that Bitly links provide some level of click tracking and reporting.

September 2022 - Email Geeks

What the documentation says
4Technical articles

Email deliverability can be negatively impacted by the use of link shorteners such as Bitly. Documentation from Mailchimp and Google highlight the decreased trust and increased likelihood of triggering spam filters when using shortened URLs, recommending full, original URLs instead. Microsoft notes that Outlook may flag shortened URLs as suspicious, also impacting deliverability and advising full URLs for security. While not inherently bad according to SparkPost, URL shorteners still pose deliverability risks, and branded short domains are recommended for improved control and reputation.

Key findings

  • Detrimental Reputation: Link shorteners can be detrimental to sender reputation.
  • Suspicious Flags: Outlook may flag shortened URLs as suspicious.
  • Decreased Trust: URL shorteners can make emails appear less trustworthy.
  • Deliverability Risks: URL shorteners can pose deliverability risks.

Key considerations

  • Full URLs: Use full, original URLs to maintain trust and avoid spam filters.
  • Branded Domains: Consider using branded short domains for better control and reputation.
  • Security and Delivery: Use full URLs for better security and deliverability in Outlook.
Technical article

Documentation from SparkPost suggests that while not inherently bad, URL shorteners can pose deliverability risks. They advise using branded short domains for better control and reputation.

May 2023 - SparkPost
Technical article

Documentation from Google highlights that using URL shorteners can make emails appear less trustworthy, potentially triggering spam filters. They recommend using the full URL.

October 2021 - Google Support
Technical article

Documentation from Microsoft explains that Outlook may flag shortened URLs as suspicious, impacting deliverability. They recommend using full URLs for better security and deliverability.

November 2022 - Microsoft Support
Technical article

Documentation from Mailchimp explains that using link shorteners can be detrimental to your sender reputation. They advise using the full, original URL to maintain trust and avoid spam filters.

July 2024 - Mailchimp