comment corriger "send-mail : Echec de l'autorisation 534 5.7.14 "

J'essaie de créer une alerte e-mail lors de la connexion de la racine de ssh, j'ai donc dû installer ssmtp y courrier électronique utilitaire.

Puis j'ai configuré ssmtp.conf comme suit :

# Config file for sSMTP sendmail
# The person who gets all mail for userids < 1000
# Make this empty to disable rewriting.
        #root=postmaster
        #Adding  email id to receive system information
root = rootuser@gmail.com
# The place where the mail goes. The actual machine name is required no
# MX records are consulted. Commonly mailhosts are named mail.domain.com
        #mailhub=mail

mailhub = smtp.gmail.com:587

AuthUser=dmymail@gmail.com
AuthPass=plaintext password
UseTLS=YES
UseSTARTTLS=YES

# Where will the mail seem to come from?
rewriteDomain=gmail.com

# The full hostname

hostname = mailserver
# Are users allowed to set their own From: address?
# YES - Allow the user to specify their own From: address
# NO - Use the system generated From: address
FromLineOverride=YES

ainsi que les revalorisations suivantes :

# Format:       local_account:outgoing_address:mailhub
# Example: root:your_login@your.domain:mailhub.your.domain[:port]

root:rootuser@gmail.com:smtp.gmail.com:25

et j'obtiens cette erreur :

send-mail: Authorization failed (534 5.7.14 https://support.google.com/mail/bin/answer.py?answer=78754 ni5sm3908366pbc.83 - gsmtp)
Can't send mail: sendmail process failed with error code 1

mais ça n'a pas marché. Veuillez m'aider à résoudre ce problème