I continue to get these error messages. It started about 3 weeks ago. Not sure what changed but this is causing real issues with sending emails to any gmail account from my yahoo.com (i.e. cox.net) email.

Sorry, we were unable to deliver your message to the following address.

nickmaly58@gmail.com:

550: 5.7.1 [34.2.68.31 12] Gmail has detected that this message is likely
5.7.1 unsolicited mail. To reduce the amount of spam sent to Gmail, this
5.7.1 message has been blocked. For more information, go to
5.7.1 https://support.google.com/mail/?p=UnsolicitedMessageError af79cd13be357-9366e3e07besi903856385a.381 - gsmtp