Infomaniak

Infomaniak is a swiss-based web and email provider that provides email hosting for domains bought at Infomaniak.

Codes

450 · 550 · 554

450
450 4.1.8 Sender address rejected: Domain not found (in reply to RCPT TO command))

The sender domain is not a valid domain or the domain has not been registered yet. This prevents spammers from making up non-existent domains that can't receive email.

550
550 5.7.1 rejected by DMARC policy for example.com (in reply to end of DATA command),

The sent message failed the DMARC policy for the sending domain. If the sending domain has a reject policy set for DMARC, the message must pass DKIM or have SPF aligned to the domain with a custom Return-Path. To resolve this, you'll need to contact your email service provider to see how to configure SPF and/or DKIM properly.

550 5.1.1 Recipient address rejected: User unknown in virtual mailbox table,

The email address does not exist. Check to make sure there are no typos or other mistakes with the address

554
554 5.7.1 Relay access denied

You are sending an email to a server that has not been configured to receive email for that domain.