Nevermind, I did not realize sendgrid setup was only for sending email, I see the other parts to setup for receiving email now. Please disregard.

@dantheman https://mxtoolbox.com/emailhealth is another good one.

The root cause for this was the Cloudron server had the hostname as "box.domain.com" (same as the relay). Debian/Ubuntu has a quirk that it will put the hostname in /etc/hosts to resolve as 127.0.1.1. This meant that when we try to set it as relay, it resolves to 127.0.1.1 instead of the actual IP.

To add to the confusion, I suggested using the host command which does not use /etc/hosts (i.e the nsswitch mechanisms) and uses only the DNS. If I had suggested using ping then we would have narrowed down the issue more quickly...

Anyway, the fix is simply to hostnamectl set-hostname somethingelse.domain.com and also edit /etc/hosts (for some reason, hostnamectl doesn't change hosts file even after reboot, 🤷 ).

@drpaneas said in gmail blocks my server?:

@jdaviescoates I have cloudron installed at home.

Ah, right.

@girish Awesome thanks.

@freetommy If I understand you correctly, what you are saying is that when email forwarding is enabled in rainloop, then the forwarding is done directly to the destination domain via port 25 instead of using Cloudron's email relay. Did I get that right?

@girish I originally tried that with no success, I figured that the Ghost CLI command initiated some other process or method

@marcusquinn I think DNS automation (provider specific) atleast needs to come from elasticemail itself ideally. It's not possible to keep track of all the DNS records each provider wants to set and if it's even available with API. It's basically impossible to test on our side atleast.

I've tried sendgrid and mailgun. 1. They were both similiar in ease to configure. 2. Mailgun seems like a better deal for those not using a massive amount of emails a month.

@edapm Personally, I'm all-in with Hetzner, not free but the best value for features I've found, particularly having network DDoS protection as standard. Others recommended include Contabo and Scaleway.

If you're getting free (inclusive) stuff from Microsoft then I suppose that's decent. Personally, I'm all GitLab, so anything GitHub is second-choice.

I guess there's nothing truly free, including your time, but those are the options I recommend, otherwise it's support tickets to Azure and hope for their ability to allow for port needs.

@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