A system and methods for correcting domain names in invalid email addresses are described herein. The method includes receiving email failure information including a bad domain name. The bad domain name is compared to valid domain names in a valid domain name database and a match distance of the bad domain name to valid domain names in the valid domain name database is evaluated. Confidence scores for the valid domain names are prepared based on the match distance. Valid domain names having confidence scores exceeding a domain match threshold are identified. A valid domain name with a confidence score exceeding the domain match threshold is selected. The method involves heuristics and machine learning. System administrator intervention may be received to assist in the selecting. An email note is sent to the corrected domain name.