What this can look like in practice
A single symptom rarely tells the whole story. These are some of the signs worth checking before deciding what needs to change.
- Outbound messages arrive but replies never reach the mailbox
- MX records point somewhere unexpected
- Messages reach server logs but not the user mailbox
- Only some recipient aliases fail
- Mailbox quotas, filters or routing rules have not been checked
What to check next
Start with the parts that can be verified. This helps avoid expensive changes based on assumptions.
- Verify the domain’s current MX destination
- Confirm the receiving server accepts mail for the domain
- Trace a controlled inbound message through server logs
- Check aliases, filters, quotas and mailbox delivery
- Verify the client is reading the correct mailbox and folders
Decision point
The practical takeaway
Treat inbound delivery as its own system path instead of repeatedly changing outbound settings.