Email Verification Results
This page will help you understand how to analyze your email verification results. Once your list is processed, you'll receive an email or link with a ZIP file to download.
The ZIP file will contain the following data files:
- _abuse.csv - This file contains all identified emails that are likely to mark your emails as spam.
- _all_results.csv - This file contains all the results.
- _catch_all.csv - This file contains all emails that our system identified as a catch-all domain. (catch-all domains are domains that accept any email, however, we do not recommend sending to catch-all domains because it's risky and can harm your IP reputation)
- _donotmail.csv - This file contains all emails that are role-based, disposable, toxic, and possible spam trap email addresses and shouldn't be mailed to, look at the sub_status to determine the classification.
- _invalid.csv - This file contains all emails that we identified as invalid.
- _original.csv - This is the original file you uploaded.
- _overview.pdf - This PDF contains an executive summary of your results, including pie charts of verification results, top domains, and data appends.
- _rejected.csv - This file contains all emails/rows that we rejected and didn't process, don't worry you weren't charged for these. We will reject duplicate emails, malformed emails, missing emails, and emails with non-ASCII characters. If this file does not appear in your download, nothing was rejected. You can see the counts of what was rejected by clicking the arrow next to the file name on the member's download screen.
- _spamtrap.csv - This file contains all emails that we identified as being spam traps.
- _unknown.csv - This file contains all emails that we could not verify, this normally happens when the email server in question times out or responds with a non-RFC-compliant response.
- _valid.csv - This file contains all the valid email addresses you should mail to.
The above files will include status and sub-status columns with the below codes.
- valid - These are emails that we determined to be valid and safe to email to, they will have a very low bounce rate of under 2%. If you receive bounces it can be because your IP might be blacklisted where our IP was not. Sometimes the email accounts exist, but they are only accepting mail from people in their contact lists. Sometimes you will get throttled on the number of emails you can send to a specific domain per hour. It's important to look at the SMTP Bounce codes to determine why. Here is a list of valid sub-statuses:
- alias_address (valid) - These email addresses act as forwarders/aliases and are not real inboxes, for example, if you send an email to email@example.com and then the email is forwarded to firstname.lastname@example.org. It's a valid email address and you can send to them, it's just a little more information about the email address. We can sometimes detect alias email addresses and when we do we let you know.
- leading_period_removed (valid) - If a valid gmail.com email address starts with a period '.' we will remove it, so the email address is compatible with all mailing systems.
- invalid - These are emails that we determined to be invalid, please delete them from your mailing list. The results are 99.999% accurate. Here is a list of invalid sub-statuses:
- does_not_accept_mail (invalid) - (invalid) These domains only send mail and don't accept it.
- failed_syntax_check (invalid) - Emails that fail RFC syntax protocols
- possible_typo (invalid) - These are emails of commonly misspelled popular domains. These emails are marked invalid.
- mailbox_not_found (invalid) - These emails addresses are valid in syntax, but do not exist. These emails are marked invalid.
- no_dns_entries (invalid) - These emails are valid in syntax, but the domain doesn't have any records in DNS or have incomplete DNS Records. Therefore, mail programs will be unable to or have difficulty sending to them. These emails are marked invalid.
- mailbox_quota_exceeded (invalid) - These emails exceeded their space quota and are not accepting emails. These emails are marked invalid.
- unroutable_ip_address (invalid) - These emails domains point to an un-routable IP address, these are marked invalid.
- catch-all - These emails are impossible to validate without sending a real email and waiting for a bounce. The term Catch-all means that the email server tells you that the email is valid, whether it's valid or invalid. If you want to email these addresses, I suggest you segment them into a catch-all group and know that some of these will most likely bounce.
- spamtrap - These emails are believed to be spamtraps and should not be mailed. We have technology in place to determine if certain emails should be classified as spamtrap. We don't know all the spamtrap email addresses, but we do know a lot of them.
- abuse - These emails are of people who are known to click the abuse links in emails, hence abusers or complainers. We recommend not emailing these addresses.
- do_not_mail - These emails are of companies, role-based, or people you just want to avoid emailing to. They are broken down into 6 sub-categories "disposable","toxic", "role_based", "role_based_catch_all", "global_suppression" and "possible_trap". Examine this file and determine if you want to email these addresses. They are valid email addresses, but shouldn't be mailed in most cases. Here is a list of do_not_mail sub-statuses:
- global_suppression (do_not_mail) - These emails are found in many popular global suppression lists (GSL), they consist of known ISP complainers, direct complainers, purchased addresses, domains that don't send mail, and known litigators.
- possible_trap (do_not_mail) - These emails contain keywords that might correlate to possible spam traps like spam@ or @spamtrap.com. Examine these before deciding to send emails to them or not.
- role_based (do_not_mail) - These emails belong to a position or a group of people, like sales@ info@ and contact@. Role-based emails have a strong correlation to people reporting mails sent to them as spam and abuse.
- disposable (do_not_mail) - These are temporary emails created for the sole purpose to sign up to websites without giving their real email address. These emails are short-lived from 15 minutes to around 6 months. There are only 2 values (True and False). If you have valid emails with this flag set to TRUE, you shouldn't email them.
- toxic (do_not_mail) - These email addresses are known for abuse, spam, or bot-created emails. If you have valid emails with this flag set to TRUE, you shouldn't email them. We also provide other additional fields that you should take into consideration before emailing. If any of your valid emails have the disposable or toxic flag set to true, we recommend that you don't email them.
- role_based_catch_all (do_not_mail) - These emails are role-based and also belong to a catch_all domain.
- unknown - These emails we weren't able to validate for one reason or another. Typical cases are "Their mail server was down" or "the anti-spam system is blocking us". In most cases, 80% of unknowns are invalid/bad email addresses. We have the lowest "unknowns" of any email validator, and we don't make this statement lightly. We paid and tested email lists at over 50 different validation companies to compare results. If you do encounter a large number of unknowns, please submit those for re-validation. Remember you are not charged for unknown results, credits will be credited back. If you still have a large number, contact us and we will take a look and verify. Here is a list of unknown sub-statuses:
- antispam_system (unknown) - These emails have anti-spam systems deployed that are preventing us from validating these emails. You can submit these to us through the contact us screen to look into.
- exception_occurred (unknown) - These emails caused an exception when validating. If this happens repeatedly, please let us know.
- failed_smtp_connection (unknown) - These emails belong to a mail server that won't allow an SMTP connection. Most of the time, these emails will end up being invalid.
- forcible_disconnect (unknown) - These emails belong to a mail server that disconnects immediately upon connecting. Most of the time, these emails will end up being invalid.
- greylisted (unknown) - Emails where we are temporarily unable to validate them. A lot of times if you resubmit these emails they will validate on a second pass.
- mail_server_did_not_respond (unknown) - These emails belong to a mail server that is not responding to mail commands. Most of the time, these emails will end up being invalid.
- mail_server_temporary_error (unknown) - These emails belong to a mail server that is returning a temporary error. Most of the time, these emails will end up being invalid.
- timeout_exceeded (unknown) - These emails belong to a mail server that is responding extremely slow. Most of the time, these emails will end up being invalid.