Guides

Mailbox transfer Copy every message from one mailbox to another, folders included. Mailbox backup Download a complete archive of your mailbox, folders and attachments included. Email deduplicator Spot duplicate messages and move them to a dedicated folder, without deleting anything. Mailbox analyzer Size per folder, most frequent senders, breakdown by year. mbox / EML import Import a Google Takeout export or EML files into any mailbox. Mailbox cleaner Sort by age, size or sender to lighten your mailbox. Mailbox slimming Pull the attachments of old messages into an archive, then strip them from the mailbox while keeping the text. Attachment extractor Pull every attachment from a mailbox into a single zipped folder. Contact export Export to CSV every address that wrote to you or that you contacted. One-off sync Copy into each mailbox the messages the other one is missing, in a single pass. Nothing is deleted. Merge & split Merge two mailboxes into one, or split a mailbox by date or by folder. mbox / EML converter Convert your exports from mbox to EML, or from EML to mbox, in a few clicks. Mailbox tester Check your credentials and discover your mailbox's size and folders. IMAP & SMTP settings Find the servers and ports for your mail provider. Header analyzer Break down an email's headers: routing, SPF, DKIM, DMARC. Address checker Check whether an email address really exists, without sending a message. Blacklist test Check whether your domain or IP is on known blacklists. EML & MSG viewer Open an EML email file in your browser, no Outlook required — and see what to do with an MSG. Signature generator Create a clean HTML signature compatible with every mail client. Contacts & calendars Transfer address books and calendars between two CardDAV / CalDAV servers.