rails, gmail client and mass-emailing failure

Hello,

I build from scratch an email componenent to my webapp using
actionmailer.
All my single email went to destination, but when I try to send
mass-emailing from the console, it sends few then crash as follow :

Any idea ? Thanks in advance !!

"221 2.0.0 closing connection 28sm928123eye.4\r\n"
-> "220 mx.google.com ESMTP 24sm234383eyx.3\r\n"
<- "EHLO vinprive.net\r\n"
-> "250-mx.google.com at your service, [88.191.88.39]\r\n"
-> "250-SIZE 35651584\r\n"
-> "250-8BITMIME\r\n"
-> "250-STARTTLS\r\n"
-> "250-ENHANCEDSTATUSCODES\r\n"
-> "250 PIPELINING\r\n"
<- "STARTTLS\r\n"
-> "220 2.0.0 Ready to start TLS\r\n"
<- "EHLO vinprive.net\r\n"
-> "250-mx.google.com at your service, [88.191.88.39]\r\n"
-> "250-SIZE 35651584\r\n"
-> "250-8BITMIME\r\n"
-> "250-AUTH LOGIN PLAIN\r\n"
-> "250-ENHANCEDSTATUSCODES\r\n"
-> "250 PIPELINING\r\n"
<- "AUTH PLAIN AHZpbnByaXZlQHZpbnByaXZlLm5ldABsYWJlbGV0dGU=\r\n"
-> "235 2.7.0 Accepted\r\n"
<- "MAIL FROM:<vinprive@vinprive.net>\r\n"
-> "250 2.1.0 OK 24sm234383eyx.3\r\n"
<- "RCPT TO:<riki@9online.fr>\r\n"
-> "250 2.1.5 OK 24sm234383eyx.3\r\n"
<- "DATA\r\n"
-> "354 Go ahead 24sm234383eyx.3\r\n"
writing message from String
wrote 214569 bytes
-> "250 2.0.0 OK 1248964197 24sm234383eyx.3\r\n"
<- "QUIT\r\n"
-> "221 2.0.0 closing connection 24sm234383eyx.3\r\n"
-> "220 mx.google.com ESMTP 10sm1237009eyd.52\r\n"
<- "EHLO vinprive.net\r\n"
-> "250-mx.google.com at your service, [88.191.88.39]\r\n"
-> "250-SIZE 35651584\r\n"
-> "250-8BITMIME\r\n"
-> "250-STARTTLS\r\n"
-> "250-ENHANCEDSTATUSCODES\r\n"
-> "250 PIPELINING\r\n"
<- "STARTTLS\r\n"
-> "220 2.0.0 Ready to start TLS\r\n"
<- "EHLO vinprive.net\r\n"
-> "250-mx.google.com at your service, [88.191.88.39]\r\n"
-> "250-SIZE 35651584\r\n"
-> "250-8BITMIME\r\n"
-> "250-AUTH LOGIN PLAIN\r\n"
-> "250-ENHANCEDSTATUSCODES\r\n"
-> "250 PIPELINING\r\n"
<- "AUTH PLAIN AHZpbnByaXZlQHZpbnByaXZlLm5ldABsYWJlbGV0dGU=\r\n"
-> "535-5.7.1 Username and Password not accepted. Learn more at
\r\n"
-> "535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257
10sm1237009eyd.52\r\n"
Net::SMTPAuthenticationError: 535-5.7.1 Username and Password not
accepted. Learn more at
535 5.7.1 http://mail.google.com/support/bin/answer.py?answer=14257
10sm1237009eyd.52

  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/net/smtp.rb:576:in
`auth_plain'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/net/smtp.rb:570:in
`__send__'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/net/smtp.rb:570:in
`authenticate'
  from
/var/rails/vin-prive/production/releases/20090730141531/config/initializers/smtp_tls.rb:28:in
`do_start'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/net/smtp.rb:377:in
`start'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/1.8/net/smtp.rb:315:in
`start'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/actionmailer-2.1.2/lib/action_mailer/base.rb:628:in
`perform_delivery_smtp'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/actionmailer-2.1.2/lib/action_mailer/base.rb:508:in
`__send__'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/actionmailer-2.1.2/lib/action_mailer/base.rb:508:in
`deliver!'
  from
/opt/ruby-enterprise-1.8.6-20090610/lib/ruby/gems/1.8/gems/actionmailer-2.1.2/lib/action_mailer/base.rb:383:in
`method_missing'
  from
/var/rails/vin-prive/production/releases/20090730141531/app/models/email.rb:38:in
`deliver'