So, I help our my sister's business by handling her domain. For some time she has paid for a virtual server with westhost.com, and on it, I have a simple forward rule in /etc/aliases for her business account to her gmail account, as she requested. trish: tsoulier [ at ] gmail [ dot ] com petservices: trish So someone emailing petservices [ at ] pawsitiveapproach [ dot ] ca will result in a forward to tsoulier [ at ] gmail [ dot ] com. This has been working fine. Suddenly it's not. ----- The following addresses had permanent fatal errors ----- tsoulier [ at ] gmail [ dot ] com (reason: 550-5.7.1 This message does not have authentication information or fails to pass) (expanded from: trish) ----- Transcript of session follows ----- ... while talking to gmail-smtp-in.l.google.com.: >>> DATA <<< 550-5.7.1 This message does not have authentication information or fails to pass <<< 550-5.7.1 authentication checks. To best protect our users from spam, the <<< 550-5.7.1 message has been blocked. Please visit <<< 550-5.7.1 https://support.google.com/mail/answer/81126#authentication for more <<< 550 5.7.1 information. s3si2560808iom.144 - gsmtp 554 5.0.0 Service unavailable I don't understand why google is asking for authentication for a simple forward. We're not relaying, we're forwarding. I'm in the middle of moving her nameservers to use my config at digitalocean so I can better control her setup, but I've had the same issue there with a simple mail forward so I'm asking. If I use postfix' virtual hosting, then that works. But why would a simple /etc/aliases forward be rejected? Help appreciated. Google's explanation is not helpful, at least to me. Mike To unsubscribe send a blank message to linux+unsubscribe [ at ] linux-ottawa [ dot ] org To get help send a blank message to linux+help [ at ] linux-ottawa [ dot ] org To visit the archives: https://lists.linux-ottawa.org