@girish said in Email not sending: include:sendgrid.net Thanks!

@rfg You have to setup a mail relay for your outbound mails. The big cloud providers like aws, gce, azure will all block emails from VMs directly. See https://cloudron.io/documentation/email/#relay-outbound-mails

@hendrikvl said in sender rewriting when using external SMTP: And no, my mail relay does not accept IP whitelisting. It's not a proper mail relay service to be exact, but just a regular mail service with outgoing smtp for authenticated users. Ah yes, someone was trying to do this with a gmail account as well sometime back (and more recently with a mailbox.org account). I think we have to implement this feature in Cloudron to make this use case work.

Hi @girish , I see, it seems to be that indeed. The server runs on Upcloud actually. I will try one of the solution you propose. Many thanks for your help, d