Problem to configure OJS SMTP Settings after upgrade from version 3.1.0 to 3.1.2-4


I upgraded my OJS from version 3.1.0 to 3.1.2-4 (latest). I´m configured the SMTP in the same way i had on OJS 3.1.0 but i´m having a specific trouble to send e-mails. After e-mail is sent, my mail server response is

“Feb 6 09:53:56 xxxx [25149]: SSL_accept error from unknown[x.x.x.x]: 0
Feb 6 09:53:56 xxxx [25149]: warning: TLS library problem: error:14094418:SSL routines:ssl3_read_bytes:tlsv1 alert unknown ca:s3_pkt.c:1494:SSL alert number 48:”

because we didn´t configure TLS on it. I need to deactivate the TLS configuration but even when i commented the autentication setting, the OJS server remained trying to send e-mail using TLS.

Now, my email settings are the following:

; SMTP server settings
smtp_server =
smtp_port = 25

; Enable SMTP authentication
;Supported mechanisms: ssl, tls
;smtp_auth = tls
;smtp_username = user
;smtp_password = xxxx

; Allow envelope sender to be specified
; (may not be possible with some server configurations)
; allow_envelope_sender = Off

; Default envelope sender to use if none is specified elsewhere
; default_envelope_sender =

; Force the default envelope sender (if present)
; This is useful if setting up a site-wide noreply address
; The reply-to field will be set with the reply-to or from address.
; force_default_envelope_sender = Off

; Amount of time required between attempts to send non-editorial emails
; in seconds. This can be used to help prevent email relaying via OJS.
time_between_emails = 3600

; Maximum number of recipients that can be included in a single email
; (either as To:, Cc:, or Bcc: addresses) for a non-priveleged user
max_recipients = 10

; If enabled, email addresses must be validated before login is possible.
require_validation = Off