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Customer Cleaner Report
Customer List Validation Analysis
File: customers_export_shopify_2026-05.csv · Scanned: May 22, 2026 11:02 AM · 3,240 customers
81
Quality
GOOD
3,240
Customers Scanned
156
Invalid Records
84
Duplicates Found
3,000
Valid Records
Issues Found
Severity
Issue Description
Field
Count
Error
Invalid email format detected e.g. "john@" (row 45), "notanemail" (row 298), "@domain.com" (row 1102)
email
23 rows
Error
Duplicate email addresses found [email protected] appears on rows 45 & 892; [email protected] on rows 1204, 1891, 2340
email
84 pairs
Error
Disposable email domains detected Domains like mailinator.com, guerrillamail.com — likely fake accounts
email
19 rows
Warning
Phone missing country code e.g. "0912345678" — should be "+886912345678" for E.164 compliance
phone
312 rows
Warning
Missing first name or last name on 98 rows Blank name fields reduce personalization effectiveness in email campaigns
first_name / last_name
98 rows
Info
MX record check failed for 41 email domains Domain exists but no mail server found — emails will bounce
email domain
41 rows
Sample Records with Issues
RowEmailPhoneFirst NameIssue
45john@ ⚠+886912345678JohnInvalid email
298notanemail ⚠0987654321AmyInvalid + no CC
892[email protected]+886911223344—Duplicate email
1102mailinator.com ⚠0922334455DavidDisposable email
1891[email protected]+886933445566LisaDuplicate email

Email Validation Results

Valid emails92.5%
Invalid format0.7%
Disposable0.6%
Duplicates2.6%
MX check failed1.3%

Phone Validation Results

E.164 compliant90.4%
Missing country code9.6%
TW mobile (+886)78.3%
US/Intl (+1/+44/etc)12.1%
Blank / missing3.1%

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This is a sample report for demonstration only. Data shown is fictional and for illustrative purposes.