Tips to Improve Email Deliverability for Email Marketing Campaigns in Zibster
If clients are not receiving your email marketing campaigns, it can reduce engagement and limit the effectiveness of your promotions. In most cases, marketing emails are not blocked entirely but are filtered into spam or promotional folders by the recipient’s email provider.
This article explains practical, proven ways to improve the deliverability of your Zibster Email Marketing campaigns and increase the likelihood that your emails reach client inboxes.
Ask Clients to Whitelist Your Email Address
One of the most effective ways to improve inbox placement is to ask clients to add your sending email address to their contacts or safe sender list.
When a client whitelists your email address, their email provider is more likely to treat your messages as trusted and deliver future campaigns to the inbox instead of spam.
Including a short reminder in your welcome email or first campaign can help ensure clients do not miss future promotions, announcements, or updates.
Understand That Some Email Providers Use Stricter Filters
Some organizations use very strict email filtering rules, especially for marketing and promotional messages. This is common with email addresses provided by:
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Universities and schools
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Banks and financial institutions
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Government agencies
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Large corporations
In these cases, emails may be filtered or blocked automatically, even when best practices are followed. These filters are controlled by the recipient’s organization and are outside of Zibster’s control.
If delivery issues primarily affect these types of email addresses, it does not indicate a problem with your Zibster account or campaign setup.
Create Clear and Professional Email Content
Email filters closely evaluate message content. Clear, professional emails are less likely to be flagged as spam.
Best practices include:
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Focusing on one clear message per email
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Avoiding excessive links or images
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Using a balanced mix of text and images
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Avoiding ALL CAPS or overly promotional wording
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Writing subject lines that clearly describe the purpose of the email
Clear, relevant subject lines and readable content tend to perform best for both engagement and deliverability.
Send Targeted Campaigns Instead of One Large Send
Sending campaigns to smaller, more relevant groups typically results in higher engagement. When recipients open, read, and interact with your emails, email providers are more likely to continue delivering your campaigns to inboxes.
Targeting emails based on client interest, session type, or past engagement helps your campaigns feel more personal and improves overall deliverability.
Use Zibster’s Built-In List Protection
Zibster automatically removes invalid, bounced, and unsubscribed email addresses from future email marketing campaigns.
This automatic list management protects your sender reputation and helps maintain healthy deliverability without requiring manual cleanup of your contact list.
Send Test Emails Before Large Campaigns
Before sending a large campaign, send test emails to yourself or trusted contacts using different email providers such as Gmail, Outlook, or Yahoo.
Testing allows you to:
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Preview formatting
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Confirm links work correctly
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Catch issues before sending to your full audience
Provide a Backup Communication Option When Needed
Even with best practices in place, some marketing emails may still land in spam folders. If a campaign is time-sensitive, consider sending a brief follow-up message through another communication channel to let clients know to check their inbox or spam folder.
This is especially helpful for promotions, deadlines, or limited-time offers.
Frequently Asked Questions
Why did some clients receive my campaign while others did not?
Email delivery varies by provider. Some email services use stricter filtering rules than others, especially for marketing emails. If only certain clients did not receive the campaign, their email provider likely filtered the message.
Why do emails to universities or financial institutions fail more often?
These organizations often use advanced security filters that automatically block or restrict marketing and promotional emails. These filters are controlled by the organization and cannot be overridden by Zibster.
Does Zibster remove bad email addresses automatically?
Yes. Zibster automatically removes invalid, bounced, and unsubscribed email addresses from future campaigns to protect your sender reputation.
Is there a way to guarantee marketing emails never go to spam?
No email platform can guarantee inbox placement. However, following best practices such as targeted sending, clear content, and encouraging clients to whitelist your email greatly improves deliverability.
Final Tip
Improving email marketing deliverability is about sending relevant content to engaged audiences using clear, professional messaging. Encouraging clients to whitelist your email address, sending targeted campaigns, and relying on Zibster’s automatic list protection can significantly improve inbox placement over time.
