Monitoring - Some users are experiencing email delivery issues when sending messages to Outlook.com, Hotmail.com, Live.com, and MSN.com addresses. These messages may be rejected due to Microsoft's email authentication requirements for high-volume senders, which appear to be intermittently affecting some lower-volume senders as well. Our systems are operating normally.
To help resolve this issue, please verify that your domain has the following DNS records configured:
SPF
An SPF record identifies which mail servers are authorized to send email on behalf of your domain. Redtail's SPF record is:
v=spf1 include:spf.redtailtechnology.com -all
If you use an email encryption service, your SPF record must also include that provider. Both services should be included in a single SPF record. Having multiple SPF records for the same domain will cause SPF authentication to fail.
If you're unsure whether you use an encryption service, contact Redtail Support, and we can check for you.
DKIM
DKIM adds a digital signature to your outgoing email, allowing receiving servers to verify that messages were sent from your domain and haven't been altered.
To set up DKIM, contact Redtail Support. We'll create a DKIM record for you to add to your domain's DNS settings.
DMARC
Microsoft also recommends configuring a DMARC record to help authenticate your outgoing email. Add a TXT record with the following settings:
Host: _dmarc
Value: v=DMARC1; p=none;
Please allow up to 48 hours for DNS changes to take effect. If you have questions or need assistance reviewing your DNS settings, please contact Redtail Support.
Nov 09, 2026 - 08:41 PST
To help resolve this issue, please verify that your domain has the following DNS records configured:
SPF
An SPF record identifies which mail servers are authorized to send email on behalf of your domain. Redtail's SPF record is:
v=spf1 include:spf.redtailtechnology.com -all
If you use an email encryption service, your SPF record must also include that provider. Both services should be included in a single SPF record. Having multiple SPF records for the same domain will cause SPF authentication to fail.
If you're unsure whether you use an encryption service, contact Redtail Support, and we can check for you.
DKIM
DKIM adds a digital signature to your outgoing email, allowing receiving servers to verify that messages were sent from your domain and haven't been altered.
To set up DKIM, contact Redtail Support. We'll create a DKIM record for you to add to your domain's DNS settings.
DMARC
Microsoft also recommends configuring a DMARC record to help authenticate your outgoing email. Add a TXT record with the following settings:
Host: _dmarc
Value: v=DMARC1; p=none;
Please allow up to 48 hours for DNS changes to take effect. If you have questions or need assistance reviewing your DNS settings, please contact Redtail Support.
Nov 09, 2026 - 08:41 PST
Investigating - We are investigating an issue affecting the delivery of some emails sent from Redtail to free Microsoft email accounts, such as Outlook.com, Hotmail.com, and MSN.com.
Impacted messages may be rejected or returned to Redtail as undeliverable.
Our teams are actively investigating and will provide updates as additional information becomes available.
Nov 06, 2026 - 15:15 PST
Impacted messages may be rejected or returned to Redtail as undeliverable.
Our teams are actively investigating and will provide updates as additional information becomes available.
Nov 06, 2026 - 15:15 PST
About This Site
Welcome to Redtail's status page. This is a good place to check for any known system issues, outages or scheduled maintenance. If you don't find what you need here, you can always contact us at:
support@redtailtechnology.com
800.206.5030
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