![]() To prevent spam from being forwarded to Gmail, update your mail provider's forwarding settings. Forwarded messages from these domains have an Authentication-Results header that shows DKIM failed. Messages sent directly to Gmail from these domains pass DKIM. ![]() Gmail has strict authentication for frequently spoofed domains, such as eBay, PayPal, and Google. If your mail server modifies forwarded messages from these domains, Gmail might mark them as phishing. Other reasons that forwarded messages fail DKIM include: Modifying the mime boundaries, third-party software modifying the body of the message, expanding the message recipient using LDAP, and re-encoding the message. If the body of the message is changed, messages won't pass DKIM authentication and might be sent to spam. However, authentication can affect message forwarding.ĭon't modify message headers or message body for forwarded messages. We recommend email administrators always set up email authentication for their domain. SENDMAILFLAGS="-oi -f $SENDER" Forwarding and authentication To fix this issue, add the following to your Procmail configuration file: ![]() Procmail typically changes the envelope sender for forwarded messages.
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