Configuration File Format

Configuration File Format (ImapCopy.cfg & CSV)

Mundofy MailMigrator maintains 100% backward compatibility with the legacy ImapCopy.cfg configuration file format used by Armin Diehl's classic tool, while adding support for modern multi-format CSV spreadsheets and clipboard imports.

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📄 Legacy ImapCopy.cfg Syntax

The configuration file is case-insensitive. Lines beginning with # or // are treated as comments and ignored.

# ==========================================================
# Mundofy MailMigrator Configuration File (ImapCopy.cfg)
# ==========================================================

# Source Server Configuration
SourceProtocol  IMAP
SourceServer    mail.oldschool.com
SourcePort      993

# Destination Server Configuration
DestServer      mail.newschool.com
DestPort        993

# Concurrency & Performance
Concurrency     4

# Security Directives
AllowInvalidCertificates  No

# Real-Time Logging
LogFile         "migration.txt"

# Folder Filtering Directives
#skipfolder     "INBOX.Trash"
#skipfolder     "INBOX.Spam"
#skipmatch      "INBOX.Temp."
#copyfolder     "INBOX"
#DstRootFolder  "OldArchive"

# IMAP Flags
DenyFlags       "\Recent"

# Account Definitions: "Copy" followed by source and destination pairs
# Format: Copy "source_user" "source_password" "dest_user" "dest_password"
# Use * as wildcard if destination matches source
Copy "alice@oldschool.com"   "SecretPass123!"   "alice@newschool.com"   "NewSecretPass1!"
Copy "bob@oldschool.com"     "B0bSecurePass#"   "bob@newschool.com"     "B0bNewPass2026!"
Copy "sales@oldschool.com"   "SalesDept2026"    "sales@newschool.com"   "SalesDept2026"

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⚙️ Directives Reference

Directive	Type	Default	Description
SourceProtocol	IMAP / POP3	IMAP	Protocol to use for the source server.
SourceServer	Hostname / IP	Required	Hostname or IP address of the source IMAP/POP3 server.
SourcePort	Integer	993	Port of source server (993 SSL, 995 POP3 SSL, 143/110 plain/STARTTLS).
DestServer	Hostname / IP	Required	Hostname or IP address of the destination IMAP server.
DestPort	Integer	993	Port of destination server (993 SSL, 143 plain/STARTTLS).
Concurrency	Integer (1–32)	4	Number of concurrent account worker threads. (Aliases: Threads, Workers).
AllowInvalidCertificates	Yes / No	No	Permit self-signed, untrusted, or unsigned SSL certificates. (Aliases: AllowInvalidCerts, PermitUnsignedSSL).
LogFile	File Path	-	Path to write real-time migration logs to (e.g. migration.txt). (Aliases: Log, ExportLog).
skipfolder	Folder Name	-	Explicit folder name to skip (e.g. skipfolder "INBOX.Trash").
skipmatch	Prefix String	-	Prefix of folders to skip (e.g. skipmatch "INBOX.Temp.").
copyfolder	Folder Name	-	If specified, ONLY matching folders are migrated.
DstRootFolder	Folder Name	-	Creates the source folder hierarchy under a destination subfolder instead of root.
DenyFlags	Space-delimited	\Recent	Specific IMAP flags to strip before copying to destination.
AllowFlags	Space-delimited	-	Explicit whitelist of IMAP flags to preserve.
converttimezone	SRC DST	-	Timezone offset mapping (e.g. converttimezone "UTC" "+0000").
CreateEmptyFolders	Yes / No	No	Recreates folders on destination even if they contain 0 messages.
Copy	Account Mapping	-	Maps source user/pass to destination user/pass. Quotes are recommended.

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📊 CSV & TSV Formats (Smart Parser v1.5.2)

In addition to ImapCopy.cfg, Mundofy MailMigrator includes an intelligent multi-format CSV/TSV parser that auto-detects column headers and accommodates various enterprise migration scenarios:

1. Classic 4-Column Format (Username + Password)

Standard spreadsheet format used when migrating standard IMAP/POP3 accounts with passwords:

SourceUser,SourcePassword,DestUser,DestPassword
alice@oldschool.com,Secret123,alice@newschool.com,NewSecret456
bob@oldschool.com,Pass789,bob@newschool.com,NewPass012

2. 2-Column Email Mapping Format (Passwordless OAuth2)

When migrating between Microsoft 365 or Google Workspace tenants where admin OAuth2 credentials are configured, no passwords are required. The smart parser automatically recognizes 2-column email mappings without mistaking destination emails for source passwords:

SourceEmail,DestEmail
alice@oldschool.com,alice@newschool.com
bob@oldschool.com,bob@newschool.com
carol@oldschool.com,carol@newschool.com

3. 1-Column Single Mailbox List (Admin Center Export)

When performing intra-tenant reorganization or when destination email addresses match source addresses exactly:

Mailbox
alice@company.com
bob@company.com
carol@company.com

💡 Auto-Detected Column Headers

The parser recognizes standard case-insensitive headers:

• Source Mailbox: SourceUser, SourceEmail, Source, User, Email, Mailbox
• Source Password: SourcePassword, SourcePass, Password, Pass
• Destination Mailbox: DestUser, DestEmail, Dest, TargetUser, TargetEmail
• Destination Password: DestPassword, DestPass, TargetPassword, TargetPass