Sending emails without consent carries numerous severe consequences. ESPs, including Salesforce Marketing Cloud, have strict consent-based policies; circumventing these can lead to Spamhaus blacklisting, which is difficult to reverse and may require adhering to Spamhaus's remediation procedures. Verification services are unlikely to remove Spamhaus listings. Ignoring consent violates GDPR and CAN-SPAM, resulting in legal action and financial penalties. It also damages sender reputation, leading to reduced engagement, increased spam complaints, and ultimately, poor deliverability. Unsolicited emails harm brand perception, making recipients distrustful. Industry documentation, including that from Spamhaus, RFC Editor, Google Postmaster Tools, M3AAWG, and Microsoft, stresses the importance of obtaining explicit consent, maintaining clean lists, and following best practices to avoid blocklisting and ensure deliverability.
12 marketer opinions
Sending emails without consent has significant consequences, including damage to sender reputation and deliverability, potential blacklisting by Spamhaus, violations of GDPR and CAN-SPAM regulations leading to fines, and harm to brand perception. ESPs have strict policies against non-consented mailings, and ISPs consider them spam. Consistently ignoring consent can permanently damage a domain's reputation, leading to lower engagement metrics, higher spam complaints, and filtering of emails into spam folders.
Marketer view
Email marketer from Litmus explains that ignoring consent will lead to lower engagement metrics (opens, clicks) and higher spam complaints, which directly affect deliverability rates. They recommend regularly cleaning your email list and focusing on engaged subscribers.
19 Sep 2024 - Litmus
Marketer view
Email marketer from Reddit responds that if you ignore consent, expect your emails to land straight in the spam folder. High spam complaint rates will signal to ESPs that your email practices are unethical, resulting in penalties and deliverability issues.
24 Sep 2023 - Reddit
3 expert opinions
Sending emails without consent carries significant risks. Once a sender is blacklisted by Spamhaus, they must comply with Spamhaus's requirements for removal. ESPs have strict policies regarding consent to protect their reputations; failure to adhere results in poor engagement, spam complaints, and damaged deliverability. Furthermore, non-compliance with CAN-SPAM and other laws can lead to legal repercussions and fines.
Expert view
Expert from Email Geeks explains that Kickbox does not want whatever the user is doing and if they’ve already stepped in the Spamhaus bear trap, they’ve gotta make them happy — they’re past the point of doing things on their own terms.
25 Jun 2024 - Email Geeks
Expert view
Expert from Spamresource.com explains that ESPs have strict policies to protect their reputation. Sending emails without consent leads to poor engagement, spam complaints, and ultimately, damage to the sender's reputation, resulting in deliverability issues.
12 Oct 2021 - Spamresource.com
5 technical articles
Sending unsolicited bulk email (UBE) without consent leads to serious consequences. Spamhaus identifies and blocks senders who don't adhere to consent and list hygiene best practices. The RFC Editor defines UBE, emphasizing the risk of blacklisting and legal action. Google Postmaster Tools highlights the negative impact on sender reputation and deliverability. M3AAWG advises obtaining verifiable consent through double opt-in and clear unsubscribe options. Microsoft stresses following email marketing best practices, including consent and honoring unsubscribe requests, with non-compliance leading to blocked services.
Technical article
Documentation from Microsoft outlines the importance of following email marketing best practices, including obtaining consent and respecting unsubscribe requests. Failure to comply can lead to deliverability issues and being blocked by Microsoft's email services.
9 Nov 2022 - Microsoft
Technical article
Documentation from Spamhaus explains that sending unsolicited bulk email (spam) is a primary reason for being listed on their blocklists. They actively monitor email traffic and identify senders who do not adhere to best practices regarding consent and list hygiene.
8 Oct 2021 - Spamhaus
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