Orange (orange.fr and wanadoo.fr)
OFR_405: sender domain DNS error
Orange refused your mail because the domain in your MAIL FROM has no valid A or MX records in DNS.
- Orange
- Provider
- Sources checked
- Author
At a glance
- Code
- OFR_405
- Who has to act
- The sender. The fix is on the sending side: your domain, your server or your list.
What it means
Code 405 is a DNS error on the sender side. Orange looked up the domain of your envelope sender (the MAIL FROM address) and did not find the records it requires: a sending domain must have valid A or MX records. Without them, a reply or a bounce to that domain could not be delivered. Orange suggests checking the DNS configuration with MxToolBox, and notes that a recent DNS change may take up to 24 hours to reach every cache.
Common causes
- The envelope sender domain has no A record and no MX record.
- The domain is misspelled in the sending configuration.
- The domain expired or its DNS stopped answering.
How to fix it
- 01Look up the MX and A records of the domain in your MAIL FROM address.
- 02Publish an MX record (or at least an A record) for the domain.
- 03If you changed DNS recently, allow time for caches to expire before retrying; Orange notes that TTLs are typically up to 24 hours.
Sources
What this page rests on, checked on 20 Oct 2026. The explanation is ours; the reply text is the server's.
- Orange Postmaster Page (SMTP Delivery Guidelines and Error Codes)postmaster.orange.fr
Related codes
- 550Sender domain has no valid MX or A record.GMX refused the mail because your sender domain is not set up in DNS as the RFCs require: it needs an MX record whose host has a valid A record.
- 550Sender domain has no valid MX or A record.IONOS refused the mail because your sender domain is not set up in DNS as the RFCs require, so a reply to it could not be delivered.
Further reading
All 20 Orange codesEvery code in the wikiPaste your own bounce