Common Email Problems¶

Use this page when email mostly works, but one mailbox or mail app is behaving oddly. For bounce messages, MailChannels errors, or full delivery failures, start with the broader email troubleshooting hub.

Quick Reference¶

Mailbox Access¶

Problem	Usually means	Start here
Webmail login fails	The mailbox password is wrong, the mailbox does not exist, or the wrong webmail URL is being used.	Reset the mailbox password.
Webmail works but a mail app fails	The mailbox is working; the device settings are likely wrong.	Find email settings.
A mail app keeps asking for the password	Old saved credentials, wrong username, or wrong server settings.	Check email settings.
Only one device has trouble	Local app cache, old password, or device-specific settings.	Find email settings.

Sending And Receiving¶

Problem	Usually means	Start here
Cannot send from a mail app	SMTP authentication, outgoing port, password, or server setting is wrong.	Review sending checks.
Cannot receive in a mail app	Incoming server, SSL, port, password, quota, or app cache issue.	Review receiving checks.
Mail sends from webmail but not the device	SMTP settings on the device need correction.	Find email settings.
Messages bounce back	Recipient address, quota, SPF, reputation, or outbound filtering issue.	Review bouncebacks.

Storage And Filtering¶

Problem	Usually means	Start here
Old messages suddenly download again	Mailbox cache or quota behavior changed after storage pressure.	Check quota.
Mailbox is full	The mailbox quota or hosting account storage is exhausted.	Manage mailbox quota.
Messages are missing	Filters, forwarders, spam folders, or POP settings may be moving mail.	Review filters.
Too much spam reaches the inbox	Additional mailbox filters may be needed.	Review spam options.

Old Messages Suddenly Start Downloading Again¶

If older messages suddenly appear as new or unread, check mailbox storage first. When a mailbox or hosting account runs out of space, mail clients can behave oddly because local cache state and server state stop matching cleanly.

Log in to cPanel.
Open Email Accounts.
Find the affected mailbox.
Check current usage and quota.
Increase the mailbox quota or remove old mail if the account is full.
Reopen the mail app and let it resync.

Manage mailbox quota

If the mailbox has plenty of space, the issue may be local to the mail app. In that case, check whether the same messages look normal in webmail before rebuilding or re-adding the account in the app.

Webmail Works But The Mail App Does Not¶

Webmail is a useful dividing line. If webmail accepts the password and shows mail, the mailbox itself is usually working.

Check the mail app for:

Username set to the full email address.
Current mailbox password.
Incoming server, port, and SSL/TLS setting.
Outgoing SMTP server, port, and authentication.
Old saved passwords in the operating system or password manager.

Find email settings

Sending Fails From One Device¶

Outgoing mail needs SMTP authentication. The username should be the full email address, and the password should be the mailbox password.

For most Fused mailboxes:

Setting	Value
Outgoing server	`smtp.fused.com`
Port	`587`
Security	TLS
Authentication	Required
Username	Full email address

If port 587 is blocked by the local network, try port 465 with SSL/TLS.

Review email settings

Messages Are Missing¶

When mail is missing, check where it went before assuming it was not delivered.

Check webmail.
Check spam, junk, trash, and archive folders.
Review forwarders.
Review global filters and mailbox filters.
Check whether any device uses POP and removes mail from the server.
Save headers from any related messages if support needs to trace delivery.

Review email filters

Spam Or Filtering Problems¶

For unwanted mail, prefer filtering into a folder instead of deleting mail automatically. That makes false positives easier to recover.

Use filters when:

Spam is reaching the inbox.
A specific sender should always go to a folder.
Messages with a known subject or phrase should be redirected.
Mail should be organized before a mail app downloads it.

Avoid broad delete rules unless the match is very specific.

Review spam options

When To Contact Fused¶

Contact Fused with the mailbox address, affected device or app, exact error, and time of the issue if:

Webmail does not accept the mailbox password after a reset.
Sending fails after confirming SMTP settings.
The mailbox is not full but mail still will not arrive.
A bounceback mentions MailChannels, blocklists, SPF, DKIM, DMARC, or reputation.
Missing messages cannot be found in webmail, filters, forwarders, or spam.