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Mail is not arriving after I changed MX records

Check Log search for the missing message first: it shows whether the mail reached SpamDuster and what happened to it. The usual causes are a domain missing from Mail domains, the destination mail server refusing the SpamDuster server, or DNS changes that have not spread yet.

Check what happened to one message

Start with one message you expected. In Log search, search by its sender or recipient and the date. See Find a message and prove it was delivered.

What Log search shows Go to
Nothing at all The message never reached SpamDuster
blocked / refused The message was blocked
temp-failed Your mail server did not take the message
delivered with a reply from your server The message was delivered

The message never reached SpamDuster

  1. Check the domain's MX records point at your Mail host (MX target): for example nslookup -type=mx example.com.
  2. If you changed them recently, wait for the old records to expire (their time-to-live). Until then some senders still deliver straight to your old server.
  3. Ask the sender for the error they received, if any.

The message was blocked

The domain may be missing from Mail domains: SpamDuster refuses mail for domains that are not listed. Add it. See Add your mail domains.

If the domain is listed, the filter judged the message to be spam, phishing or malware. See Wanted mail was blocked.

Your mail server did not take the message

SpamDuster could not deliver to your destination mail server, so the sending server will retry. Run the destination test: open Advanced and select Test without saving under Destination mail server. See The destination test fails.

The message was delivered

SpamDuster delivered the message and your mail server accepted it. The Destination reply shows your server's answer, which usually includes its own queue id. Look the message up in your mail server's logs, or ask whoever runs it: the message may be in a junk folder, filtered by a mailbox rule, or held by your mail server.

Mail for new senders arrives a few minutes late

That is greylisting working as intended. See Mail from new senders is delayed.

Updated 2026-10-26Need help? Open a ticket in the billing portal.