According to my hosting company, the problem is that one of google's server (that you are assigned to) is being blocked, in my case it is by spamcop - I've been struggling with the same issue for a few days now.
Don't know how to escalate this with google but it needs sorting. Mike On Sunday, 5 January 2014 01:24:53 UTC+8, Nelson Ingersoll wrote: > > For the last several days I have been unable to send any email. All of my > out going email fails with this error. I do not understand why google > would be trying to authenticate to smtp.mail.com. I do forward email > FROM mail.com to my gmail account. I am perplexed. Can anyone offer any > explanation why this is happening and what I might be doing to cause it? > It is driving me nucking futz! > > Nelson > > > Technical details of permanent failure: > Google tried to deliver your message, but it was rejected by the relay > smtp.mail.com by smtp.mail.com. [74.208.5.15]. > > The error that the other server returned was: > 535 Authentication credentials invalid (SMTP AUTH failed with the remote > server) > -- You received this message because you are subscribed to the Google Groups "Gmail-Users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/gmail-users. For more options, visit https://groups.google.com/d/optout.
