Why are emails not being sent?

Question

System administration

In general, letters are not sent in any way.
I use Laravel with these

settings

/*
  |--------------------------------------------------------------------------
  | Mail Driver
  |--------------------------------------------------------------------------
  |
  | Laravel supports both SMTP and PHP's "mail" function as drivers for the
  | sending of e-mail. You may specify which one you're using throughout
  | your application here. By default, Laravel is setup for SMTP mail.
  |
  | Supported: "smtp", "mail", "sendmail", "mailgun", "mandrill", "log"
  |
  */
  'driver' => 'smtp',

  /*
  |--------------------------------------------------------------------------
  | SMTP Host Address
  |--------------------------------------------------------------------------
  |
  | Here you may provide the host address of the SMTP server used by your
  | applications. A default option is provided that is compatible with
  | the Mailgun mail service which will provide reliable deliveries.
  |
  */
  'host' => 'smtp-pulse.com',

  /*
  |--------------------------------------------------------------------------
  | SMTP Host Port
  |--------------------------------------------------------------------------
  |
  | This is the SMTP port used by your application to deliver e-mails to
  | users of the application. Like the host we have set this value to
  | stay compatible with the Mailgun e-mail application by default.
  |
  */
  'port' => 2525,

  /*
  |--------------------------------------------------------------------------
  | Global "From" Address
  |--------------------------------------------------------------------------
  |
  | You may wish for all e-mails sent by your application to be sent from
  | the same address. Here, you may specify a name and address that is
  | used globally for all e-mails that are sent by your application.
  |
  */
  'from' => ['address' => '[email protected]', 'name' => 'Dmitry'],

  /*
  |--------------------------------------------------------------------------
  | E-Mail Encryption Protocol
  |--------------------------------------------------------------------------
  |
  | Here you may specify the encryption protocol that should be used when
  | the application send e-mail messages. A sensible default using the
  | transport layer security protocol should provide great security.
  |
  */
  'encryption' => 'tls',

  /*
  |--------------------------------------------------------------------------
  | SMTP Server Username
  |--------------------------------------------------------------------------
  |
  | If your SMTP server requires a username for authentication, you should
  | set it here. This will get used to authenticate with your server on
  | connection. You may also set the "password" value below this one.
  |
  */
  'username' => '[email protected]',

  /*
  |--------------------------------------------------------------------------
  | SMTP Server Password
  |--------------------------------------------------------------------------
  |
  | Here you may set the password required by your SMTP server to send out
  | messages from your application. This will be given to the server on
  | connection so that the application will be able to send messages.
  |
  */
  'password' => 'тут пароль',

  /*
  |--------------------------------------------------------------------------
  | Sendmail System Path
  |--------------------------------------------------------------------------
  |
  | When using the "sendmail" driver to send e-mails, we will need to know
  | the path to where Sendmail lives on this server. A default path has
  | been provided here, which will work well on most of your systems.
  |
  */
  'sendmail' => '/usr/sbin/sendmail -bs',