Email Delivery Issues (IP-Based Filtering)

Overview

If you, your team, or your customers are not receiving emails from Biller Genie, the most common cause is company email or network security systems blocking messages based on sending IP addresses.

This type of filtering can affect invoices, CC copies, customer notifications, login emails, and other system-generated messages.

What Emails Can Be Affected

IP-based email filtering can interfere with multiple types of Biller Genie emails, including:

• Invoices sent to customers
• CC copies of invoices sent to you or your team
• Payment confirmation emails
• Login emails such as magic links or verification codes
• System notifications and alerts

If any of these emails are missing, delayed, or delivered inconsistently, IP-based filtering is a likely cause.

Common Signs of IP-Based Blocking

You may be experiencing IP-based email blocking if:

• Customers report that they never received an invoice
• You are not receiving CC copies of invoices that were sent successfully
• Emails arrive too late to be usable
• Login links expire before they can be clicked
• Messages deliver to personal email addresses (such as Gmail or Yahoo) but fail to reach company or work email addresses

This issue often begins after changes to email security settings, firewall rules, spam-filter configurations, or Microsoft 365 or Google Workspace environments.

Allowlisting Biller Genie Sending IPs

Step 1

Identify whether you have administrator access to your company's email or security system.

If you do not have administrator access, you will need to contact your IT team or email provider to complete the remaining steps.

Step 2

Allow inbound email from Biller Genie by allowlisting the sending IP ranges listed below. Allowlisting ensures emails are delivered immediately and are not delayed, quarantined, or blocked by security systems.

Step 3

Add the following Biller Genie sending IP ranges to your email or security system allowlist:

87.253.232.0/21

185.189.236.0/22

185.211.120.0/22

185.250.236.0/22

45.14.148.0/22

These IP ranges must be explicitly allowed, not simply monitored. When possible, allow them at the SMTP or inbound connection level. IP reputation filtering, rate limiting, throttling, sandboxing, and delayed delivery rules should be bypassed for these addresses.

When IT Assistance Is Required

You will need help from your IT team or email provider if:

• You do not have administrator access
• Your company uses advanced email security tools
• Invoices are not reaching customers
• Emails are missing without appearing in spam or junk folders

You may send the message below to your IT team:

Message for IT Team:

Please allow inbound email from the following sending IP ranges to ensure reliable delivery of Biller Genie invoices and notifications:

87.253.232.0/21

185.189.236.0/22

185.211.120.0/22

185.250.236.0/22

45.14.148.0/22

For step-by-step configuration instructions for your specific email provider, see: Allowlisting Biller Genie IPs by Email Provider.