A bounce message, one with a subject like Undelivered Mail Returned to Sender, a sender named Mail Delivery Subsystem, or an address like mailer-daemon@…, is written by a mail server, not by BlueMail. It is the server's way of saying it refused a message and handed it back.
That matters for what you should do next. Because BlueMail did not produce the bounce, app-side fixes cannot stop it: reinstalling BlueMail, clearing the cache, or removing and re-adding the account will make no difference. The condition being reported lives on the mail server, so that is where it has to be fixed.
What the code in the bounce means
Bounce messages usually quote a three-digit code. These are the ones people most often see:
- 552 and 452: The action was aborted because a mailbox is over its storage allocation. In plain terms, a mailbox is full.
- 550: The mailbox is unavailable: not found, no longer in use, or rejected for policy reasons. Check the address for typos, and check that it still exists.
- 554: Rejected by the receiving domain. This is a blanket "not allowed", and it is often about sending reputation or spam filtering rather than the address itself.
For the fuller list, see Understanding the SMTP Error Codes.
The same full-mailbox condition shows up under other protocols with different wording. OVERQUOTA in IMAP error codes and -ERR Disk quota exceeded in POP3 error codes are the same problem seen from your side of the connection instead of the sender's.
If the bounce is for mail sent to you, your mailbox is full
This is the part readers usually miss. If people writing to you get a 552 or 452, it is your mailbox that is over quota, and that is also why your new mail stopped arriving. The server has nowhere to put incoming messages, so it rejects them and returns them to whoever sent them. Both symptoms are one problem.
Free up space and delivery resumes on its own.
Free space in your provider's webmail
Do this in your provider's web interface in a browser, signed in to the affected account. Storage quota is set and counted by the provider, so the provider's own tools are what release it.
- Delete the largest messages first, anything with big attachments.
- Empty the Trash. Deleted mail still counts against your quota until the Trash is emptied.
- Empty Spam or Junk.
- Empty Archive, if your provider has one. Archived mail is still stored mail.
Two things that do not free server space:
- Clearing BlueMail's cache. Clear Cache frees storage on your device only. It never touches your quota on the server.
- Deleting in BlueMail alone, in some setups. Messages you delete move to Trash and keep occupying the quota until the Trash itself is emptied. See How do I empty all the emails in the Trash folder?. After emptying, check your usage figure in webmail to confirm the space was actually released.
POP3 accounts: mail can pile up on the server
If the account is set up as POP3, there is a BlueMail setting worth checking. Delete Messages on Server defaults to Never, which means downloading your mail into BlueMail leaves every copy on the server indefinitely. Over time that alone can fill the quota.
To see or change it:
- Go to Settings.
- Navigate to Accounts.
- Tap on your account.
- Select Delete Messages on Server.
The options are Never (the default), When deleting from trash, and When downloading messages. Details are in How to Delete Emails from the Server with POP3 Accounts?.
Choose carefully: once a message is deleted from the server, other devices can no longer download it. And whichever option you pick, clear the backlog that is already on the server from your provider's webmail.
Can BlueMail bring back a bounced message?
아니요. 반송된 메시지는 결코 당신의 사서함에 도달하지 못했습니다. 서버가 거부하고 발신자에게 되돌려 보냈으므로 BlueMail이 가져오거나 복원하거나 재전송할 복사본이 없습니다. 앱의 어떤 것도 이를 복구할 수 없습니다.
공간이 확보되면 발신자에게 다시 메시지를 보내 달라고 요청하십시오. 그 시점부터 발송된 메일은 정상적으로 배달됩니다.
아무도 반송 메일을 받지 않지만 메일이 여전히 누락되면
그때는 다른 문제입니다. 이미 배달되었지만 기대하는 위치에 없던 경우에는 Missing Emails]로 시작하고, 서버와의 동기화가 전혀 이루어지지 않는 경우에는 Connection Issues, Sync Failures or Missing Emails로 확인하십시오 BlueMail가 서버와 동기화되지 않는 경우.
