Why are opted-in customers not receiving emails from my marketing campaign?

Email marketer from SendGrid shares that low engagement can lead to deliverability issues. If recipients aren't opening or clicking on your emails, mailbox providers may start filtering your messages to spam. Regularly cleaning your email list to remove unengaged subscribers is important.

Marketer from Email Geeks shares that if emails are not delivered (meaning neither inbox nor spam), they will bounce with a reason. B2B emails might be dropped without bounces due to company-specific filters based on sending habits or reputation. More details are needed to provide a specific answer.

Email marketer from Mailchimp explains that segmentation helps target specific groups within your audience. Subscribers may not be receiving emails if they're not included in the segments you're sending to, or if they're in suppressed segments.

Marketer from Email Geeks shares that email can be accepted by the receiving mail server but then quarantined by a mail filter, preventing it from reaching the user's mailbox. This can be confirmed with the IT team of the recipient.

Email marketer from Reddit shares that emails are likely going to the spam folder due to content triggers, poor sender reputation, or authentication issues. They recommend checking your content for spam words and ensuring proper email authentication.

Email marketer from Quora shares that frequency capping might be preventing some subscribers from receiving all emails. If you've set limits on how often subscribers receive emails, some might miss campaign messages.

Email marketer from HubSpot explains that, despite the customer opting-in, a failure to complete double opt-in can also cause the email to be blocked, depending on your email configuration. So check that the customer has infact verified their email.

Email marketer from Stack Overflow answers that recipients may have been accidentally added to a suppression list. Check your suppression lists to ensure that valid subscribers haven't been mistakenly included.

Email marketer from Litmus explains that coding errors can cause display issues, leading recipients to mark emails as spam or ignore them. Always test your emails across different email clients and devices to ensure proper rendering.

Marketer from Email Geeks recommends isolating the segment that isn’t receiving emails and determining their mailbox providers (Google, Microsoft, etc.) to compare with the rest of the database that isn’t having issues, this can help narrow down the cause.

Expert from Word to the Wise emphasizes the importance of email authentication (SPF, DKIM, DMARC) for deliverability. Proper authentication helps mailbox providers verify the sender's identity and reduces the chances of emails being filtered as spam. Failing to authenticate can result in legitimate emails not reaching the inbox.

Expert from Word to the Wise explains that careful attention to bounce processing and list hygiene is essential. Inaccurate hard bounce handling can lead to sending to bad addresses, hurting sender reputation and deliverability. Also poor list hygiene practices can lead to opted-in users not receiving emails.

Expert from Spam Resource explains that maintaining a good sender reputation is crucial for email deliverability. Sending from new IPs or domains requires careful IP warming to build a positive reputation with mailbox providers. Sudden increases in sending volume from an unproven IP can trigger spam filters, causing emails to be blocked or sent to spam.

Expert from Email Geeks suggests that the ESP should provide delivery data for every email, including whether it was delivered, rejected, or deferred, along with the corresponding message. This data can offer insights into the issue. If the ESP doesn't provide that data then you should ask them for help.

Expert from Email Geeks explains that a common gap is that emails may be severely delayed or permanently deferred by the mailbox provider. If the emails are being deferred they may be in a reporting gap where bounces are tracked but assumed that everything that hasn't bounced must have delivered.

Expert from Email Geeks shares their experience with an ESP reporting "sent" when messages were actually rejected, and recommends reviewing logs to confirm the delivery status, particularly with smaller SaaS ESPs.

Documentation from RFC 4408 explains that SPF records should be correctly formatted in DNS. It mentions that syntax errors or incorrectly configured SPF records can lead to authentication failures, causing emails to be rejected or marked as spam by receiving mail servers.

Documentation from Microsoft 365 Documentation shares that to improve email deliverability, senders should ensure their sending IP addresses are not on any blocklists, maintain a good sender reputation by avoiding spam complaints, and use the Junk Email Reporting Program (JMRP) to monitor feedback. Also it's important to ensure you have authenticated with SPF, DKIM and DMARC.

Documentation from Gmail Help explains that bulk email senders should authenticate their email with SPF, DKIM, and DMARC. They should also keep their spam rate below 0.1% and provide an easy way for recipients to unsubscribe. Failure to comply with these guidelines can lead to emails being filtered to spam or blocked.