What is SASL login authentication failed?

1 Answer. To explain, the SASL authentication failed messages are from the remote server. It’s saying that there’s a process somewhere on, or behind, your IP address that is pounding that server trying to guess passwords, in order to send spam.

How do I know if Dovecot is working?

To check that Postfix and Dovecot are running and to find startup errors, follow these steps:

  1. Run this command to check that Postfix is running: service postfix status.
  2. Next, run this command to check that Dovecot is running: service dovecot status.
  3. Examine the results.
  4. Try to restart the services.

What is UGFzc3dvcmQ6?

So UGFzc3dvcmQ6 = Password: When an IMAP client tries to connect to a Dovecot server using the SASL LOGIN protocol, Dovecot asks for the user’s password. If the SASL protocol attempted by the client doesn’t match the standard that Dovecot is expecting (common with spambots and hackers), Dovecot reports an error.

What Dovecot setting specifies the authentication methods that the server supports?

Variables that can be used for this setting:

  • Global variables.
  • %{user} / %u : Username.
  • %{login} : Remote login name (from login@host)
  • %{host} : Remote hostname (from login@host)

What does Sasl stand for?

Simple Authentication and Security Layer
Simple Authentication and Security Layer (SASL) is a framework for authentication and data security in Internet protocols.

What is dovecot process?

dovecot process is the Dovecot master process which keeps everything running. anvil keeps track of user connections. log writes to log files. All logging, except from master process, goes through it. config parses the configuration file and sends the configuration to other processes.

What is dovecot and postfix?

Postfix is an open-source mail transfer agent (MTA), a service used to send and receive emails. Dovecot is an IMAP/POP3 server and in our setup it will also handle local delivery and user authentication.

What is SASL plain?

SASL/PLAIN Overview. PLAIN, or SASL/PLAIN, is a simple username/password authentication mechanism that is typically used with TLS for encryption to implement secure authentication. The username is used as the authenticated principal , which is used in authorization (such as ACLs).

What is SASL based authentication?

Simple Authentication and Security Layer (SASL) is a framework for authentication and data security in Internet protocols. It decouples authentication mechanisms from application protocols, in theory allowing any authentication mechanism supported by SASL to be used in any application protocol that uses SASL.