# Net::SMTPAuthenticationError with use of gmail smtp **URL:** \ **Category:** Rails\ **Created:** [May 2, 2009, 6:46pm UTC](https://www.ruby-forum.com/t/net-smtpauthenticationerror-with-use-of-gmail-smtp/167044 "2009-05-02T18:46:28Z")\ **Posts on this page:** 1\ **Page:** 1
**Author:** ![chirag\_shah](https://www.ruby-forum.com/letter_avatar_proxy/v4/letter/c/47e85d/32.png) [@chirag\_shah](https://www.ruby-forum.com/u/chirag_shah)\ **Post date:** [May 2, 2009, 6:46pm UTC](https://www.ruby-forum.com/t/net-smtpauthenticationerror-with-use-of-gmail-smtp/167044/1 "2009-05-02T18:46:28Z")
Before today my mail service is working well. But i got suddenly Error for Net::SMTPAuthenticationError And get error page with following message 421 4.7.0 Temporary System Problem. Try again later (HS). m29sm19625431poh.25 can any one help me in this? Why this occur? I haven’t do any changes in my settings. Its same as before my mail service is working… Is there any service issue? Thanks, Chirag Shah Software Engineer > **[Web Professional](http://blogofchirag.blogspot.com/)** > > Working with Ruby on Rails since july 2007. RoR web application development along with other technologies like LAMP.The reason to love programming with RoR is, it helps keep code simple, clean and nice… > Also working with php/cakephp etc.