Bulk Email Problems with Gmail

[ceekay27]

Hi all,

A couple of days ago I sent out a bulk email to members on my forum to notify them of a competition. All went ok.
Today I had a new member sign, she contacted to me to say she didn't receive the activation email, so I sent her a reply from my domain email, and it got returned to me, with this error:

SMTP error from remote mail server after end of data:
    550-5.7.1 [89.187.86.7       1] Our system has detected an unusual rate of
    550-5.7.1 unsolicited mail originating from your IP address. To protect our
    550-5.7.1 users from spam, mail sent from your IP address has been blocked.
    550-5.7.1 Please visit
    550-5.7.1  https://support.google.com/mail/?p=UnsolicitedIPError to review our
    550 5.7.1 Bulk Email Senders Guidelines. p6si13848491wrd.350 - gsmtp

Now my domain email sends the activation emails, and it seems that google has now decided that I am a spammer. So any mail sent from my domain to a Gmail account won't be received.

I have tried to see what I can do to remedy this problem, but I'm not tech minded in the slightest, I have no idea what valid reverse DNS records are, and no idea what any of the google steps mean, or how I can work them into my forum, or cpanel. I'm at a total loss!

Can anyone please help with a solution, or at least point me in the direction of a way to verify in laymans terms.

Thanks in Advance.

[Aleksi "Lex" Kilpinen]

This is usually the first measure from Gmail when they strongly suspect spamming, and if the first time - and the activity that caused it stops, it may be temporary. But... There are a lot of variables to this, and not really anything related to SMF as such.

Perhaps this might help to give an idea of how it all works
https://www.rackaid.com/blog/gmail-blacklist-removal/