I am sending out confirmation (and other emails) when users sign up. The problem is that when I send to addresses that are not gmail or hotmail or any of the larger email services, it throws me an error in the email header.
{
"severity": "permanent",
"tags": [],
"delivery-status": {
"tls": false,
"mx-host": "mxer.customdomain.com",
"code": 553,
"description": null,
"session-seconds": 6.566637992858887,
"message": "553 5.1.8 <[email protected]>... Domain of sender address [email protected] does not exist",
"certificate-verified": false
},
"envelope": {
"transport": "smtp",
"sender": "[email protected]",
"sending-ip": "123.45.678.900",
"targets": "[email protected]"
},
"recipient-domain": "customdomain.com",
"id": "AbCDeFGhiJk_lMn",
"campaigns": [],
"reason": "generic",
"user-variables": {},
"flags": {
"is-routed": null,
"is-authenticated": true,
"is-system-test": false,
"is-test-mode": false
},
"log-level": "error",
"timestamp": 1456123374.411238,
"message": {
"headers": {
"to": "First Last <[email protected]>",
"message-id": "56caade72ed26_***********[email protected]",
"from": "Team Accounts <[email protected]>",
"subject": "Confirmation instructions"
},
"attachments": [],
"recipients": [
"[email protected]"
],
"size": 1143
},
"recipient": "[email protected]",
"event": "failed"
}
Did I set my headers wrongly or is there a configuration I need to set up before I can send emails to custom domains?
It seems that for some email services, it requires a valid "receive" MX record for your domain/subdomain (for Mailgun it was mg.mydomain.com) to verify the identity of the sender. I added the MX records
10 mxa.mailgun.org
10 mxb.mailgun.org
for mg.mydomain.com and it seemed to have worked.