L’option « smtpSecure » est indispensable pour les hosts SMTP demandant une authentification SSL (ex:gmail/smtp.gmail.com) Voici un exemple de configuration qui pourrait aller:

[mailer]
webmasterEmail="webmaster@domaine.com"
webmasterName=webmaster

; how to send mail : "mail" (mail()), "sendmail" (call sendmail), or "smtp" (send directly to a smtp)
mailerType=
; Sets the hostname to use in Message-Id and Received headers
; and as default HELO string. If empty, the value returned
; by SERVER_NAME is used or 'localhost.localdomain'.
hostname=
sendmailPath="/usr/sbin/sendmail"

; if mailer = smtp , fill the following parameters

; SMTP hosts.  All hosts must be separated by a semicolon : "smtp1.example.com:25;smtp2.example.com"
smtpHost=
; default SMTP server port
smtpPort=
; secured connection or not. possible values: "", "ssl", "tls"
smtpSecure=
; SMTP HELO of the message (Default is hostname)
smtpHelo=
; SMTP authentication
smtpAuth=on
smtpUsername="webmaster@domaine.com"
smtpPassword=
; SMTP server timeout in seconds
smtpTimeout=30