Gmail is blocking my emails sent to them

Question

I believe I got blocked for sending too many emails to one address by gmail. I have an application I made and I had email notifications on. It was sending a lot of notifications recently. I have since altered it so I don't send so many, however it seems I was too late. I got blocked for sending too many emails from my site to my gmail account.

Is there a way to appeal this at all?

 host gmail-smtp-in.l.google.com[2607:f8b0:4002:c07::1b]
    said: 550-5.7.1 [2604:180::1458:e4e6      12] Our system has detected that
    this 550-5.7.1 message is likely unsolicited mail. To reduce the amount of
    spam sent 550-5.7.1 to Gmail, this message has been blocked. Please visit
    550-5.7.1 http://support.google.com/mail/bin/answer.py?hl=en&answer=188131
    for 550 5.7.1 more information. d5si6473448yhn.57 - gsmtp (in reply to end
    of DATA command)

The reason for being blocked is due to sending too many emails.

Answer 1

At Gmail Support area there's the reference to the daily sending limit, which is 500 messages per day or a huge number of undeliverable messages.

In an effort to fight spam and prevent abuse, Google will temporarily disable your account if you send messages to more than 500 recipients or if you send a large number of undeliverable messages. If you use a POP or IMAP client (for example: Microsoft Outlook or Apple Mail), you may only send a message to 100 people at a time. Your account should be re-enabled within 24 hours.

As stated, your account should be back within 24 hours. If you want to keep using Gmail, you can use Google Apps, as the limits are higher (2000).

My recommendation is that you use a professional Email Sending service like Amazon SES.

Answer 2

You can increase your ranking by adding a Sender Policy Framework to your domain. See:- http://www.openspf.org/SPF_Record_Syntax