Troubleshooting IMAP Sync Errors

Application-specific
password required (Failure)

Two-factor authentication is turned on for the Gmail account.

Create an application-specific password for Lead Gen & CRM.
Use that created password
for Gmail's two-factor authentication service.

[CLOSED] IMAP connection
broken (Server response)

The IMAP connection was broken while talking with the server. The server unexpectedly closed the connection.  

This is an issue with your server. Contact your system administrator. 

Could not find outbox

When IMAP attempted to sync with Google, it could not locate an outbox.

Deadline exceeded

IMAP stopped syncing mail in the mailbox after encountering a timeout. 

[Folder name]
does not exist

The folder mapped for an inbox or outbox does not exist on the server.

Map to a valid folder or
create a folder with the listed name in your email account.

Mailbox does not exist:
[Mailbox name]

The mailbox mapped for an inbox or outbox does not exist on the server.

Map to a valid mailbox or
create a mailbox with the listed name in your email account. 

No inbox or
outbox specified

The Custom Provider option was chosen for IMAP syncing, but an inbox or outbox was not mapped.

No such host as
[Hostname]

Provide the correct hostname, or fix the DNS for the current hostname.

TLS/SSL failure
for [Web address]:
SSL negotiation failed

This is an issue with your server. Contact your system administrator.  

Authentication failed

Account has an incorrect username or password.

Empty username
or password

 IMAP: Connection closed

While the IMAP connection was waiting on authentication, the server closed the connection.  

Invalid credentials (Failure)

Account has an incorrect username or password.

Invalid IMAP username
or password

Account has an incorrect username or password.

LOGIN authentication failed

Account has an incorrect username or password.

LOGIN bad name or
user password

Account has an incorrect username or password.

LOGIN failed

Account has an incorrect username or password.

Password must be
changed before IMAP
login permitted

The host requires a password change in order to enable IMAP.

Change the password and reattempt IMAP sync with the new credentials.

PLAIN not supported
by the server

The server does not support PLAIN logins, which is required for all logins other than Gmail open authorization. 

There was an issue with
your IMAP settings

A general error stating that there are incorrect settings for an account or IMAP connection.

Double-check the information and credentials you are using. Re-attempt the sync process. If the problem persists, contact your system administrator.

XOAUTH2 authentication
error (400)

Open authorization failure when logging into Gmail accounts.

This is an issue with your server. Contact your system administrator.  

Your account is not enabled
for IMAP use. Please visit
your Gmail settings page
and enable your account
for IMAP access. (Failure)

DialWithDialer:
[Web site]:
[Server address]:
I/O timeout

DialWithDialerTLS:
[Web site]:
[Server address]:
Certificate has expired
or is not yet valid

DialWithDialerTLS:
[Web site]:
[Server address]:
Certificate is valid for
[Domains]

DialWithDialerTLS:
[Web site]:
[Server address]:
Certificate signed by
unknown authority

DialWithDialerTLS:
[Web site]:
[Server address]:
connect: Connection refused

DialWithDialerTLS:
[Web site]:
[Server address]: read: Connection reset by peer

The IMAP connection was ended while talking with the server. The server decided to end the connection.

DialWithDialerTLS:
[Web site]:
[Server address]:
No such host

DialWithDialerTLS:
[Web site]:
[Server address]:
Oversized record received
with length [length]