Swiftmailer yii2 can't send mail from server other than gmail, can't figure out why?

Question

Yii

When sending mail from gmail, everything works fine, as soon as I apply the server settings that the admin gave me for mail, everything flies and gives an error, help me figure it out.
Mailer settings
'mailer' => [
'class' => 'yii\swiftmailer\Mailer',
'viewPath' => '@common/mail',
'useFileTransport' => false,
'transport' => [
'class' = > 'Swift_SmtpTransport',
'host' => 'mail.chumak.net',
'username' => '******',
'password' => '******',
'port' = >
And the error it is giving now.
stream_socket_enable_crypto(): SSL operation failed with code 1. OpenSSL Error messages:
error:14090086:SSL routines:SSL3_GET_SERVER_CERTIFICATE:certificate verify failed

Answer 1

Remove encryption altogether or change tsl to ssl. Apparently it's in the certificate.