Google Compute Engine does not allow outbound connections on ports 25, 465, and 587. By default, these outbound SMTP ports are blocked because of the large amount of abuse these ports are susceptible to. You can find more information on how to send email from a VM and what services to use on the "Sending Email from an Instance" documentation page <https://cloud.google.com/compute/docs/tutorials/sending-mail/>.
-- You received this message because you are subscribed to the Google Groups "Google App Engine" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/google-appengine. To view this discussion on the web visit https://groups.google.com/d/msgid/google-appengine/938fcc3a-ba19-4cb3-b70e-248b462d6a14%40googlegroups.com. For more options, visit https://groups.google.com/d/optout.
