One of the most wide-spread types of abuse is SPAM. We take dealing with abuse seriously and have since implemented certain safeguards to diminish the issue.
Be advised, that if we observe IP hitting spam limit repeatedly, the range will be block-listed to retain the reputation.
To improve the quality of your messages and mailing practice we suggest you refer to Sender Best Common Practices issued by M3AAWG.
If you have any questions regarding this, do not hesitate to reach out to [email protected] or your assigned account manager.