Extract Email Addresses from Outlook Emails & Calendars

Outlook’s built-in export (File > Open & Export > Import/Export) only exports contacts you have manually saved to your Contacts folder. It does not extract email addresses from the messages sitting in your inbox, sent folder, or reply chains. SigParser fills that gap by scanning your actual emails and calendar meetings to surface every address you have ever corresponded with, including people you never saved as a contact.

No. The new Outlook (released in 2023 and updated through 2024 and 2025) removed several features from the classic desktop app, and bulk email address extraction from messages is not available natively in either version. Microsoft support forums are full of users asking for exactly this feature. SigParser connects to your Outlook or Microsoft 365 account via OAuth and handles this automatically, without any changes to how you use Outlook day to day.

Yes. SigParser connects to Outlook desktop, Microsoft 365 (formerly Office 365), Exchange Server, and any IMAP-compatible email account. Setup uses Microsoft’s OAuth authentication, so no password is required. You can connect a single mailbox or your entire organization’s Exchange environment, and SigParser will scan and deduplicate contacts across all of them.

The free trial includes a 90-day historical scan across up to three Outlook or Microsoft 365 mailboxes. No credit card is required to start. You will only be asked to pay if you want to scan further back in history, add more mailboxes, or subscribe for ongoing monitoring. Most users find hundreds of contacts in the free trial before deciding whether to go further.

.On average, SigParser finds around 7,400 contacts per mailbox per year of email history. A team of 10 sales reps scanning two years of Outlook history typically uncovers 15,600 contacts. One customer connected 8 Outlook mailboxes and found over 9,000 email addresses, 6,000 phone numbers, and 1,900 job titles. Your first 90 days of history are free, so you can see your own results before committing to anything.

About two minutes. You authorize SigParser to connect to your Outlook or Microsoft 365 account using Microsoft’s secure OAuth login, choose how far back to scan, and SigParser starts immediately. There is no software to install, no IT support required, and nothing changes about how you use Outlook. Most users have their first contacts ready to export within a few hours of connecting.

Yes. SigParser supports connecting one mailbox or hundreds, including a mix of individual Outlook accounts, shared Microsoft 365 mailboxes, and Exchange accounts. Contacts are automatically deduplicated across all connected accounts, so the same person appearing in multiple inboxes becomes one clean, complete record. The more mailboxes you connect, the more complete your contact picture becomes.

Yes. SigParser pulls over 60 contact fields from Outlook email signatures and calendar invites, including full name, phone numbers, job title, company name, LinkedIn URL, and physical address. It also extracts meeting participants from Outlook Calendar, surfacing contacts from people who attended meetings but may never have sent you an email directly. You get complete contact records, not just a list of addresses.

Yes, and this is something Outlook’s native tools and most third-party extractors cannot do. SigParser reads deeply nested reply chains and forwarded messages to surface contact details from every sender in the thread, not just the most recent one. These are often the most valuable contacts because they represent real business conversations that happened before anyone thought to save the address.

Yes. Once SigParser has extracted your Outlook contacts, you can export them as a CSV or Excel file in one click. SigParser also integrates directly with Salesforce, HubSpot, and Microsoft Dynamics for CRM enrichment, and with Mailchimp and Constant Contact for email marketing. For teams who want continuous sync, Zapier and Make.com connectors are available to push new contacts automatically as your Outlook activity continues.

No. SigParser connects using Microsoft’s OAuth authentication standard, the same method used by apps like Teams, Slack, and Salesforce to connect to Microsoft 365. You authorize access directly through Microsoft’s own login screen. SigParser never sees or stores your password, and you can revoke access at any time from your Microsoft account security settings. SigParser is SOC 2 certified and all data is encrypted at rest and in transit.

SigParser has best-in-class support for English signatures and contact data from Outlook. German is the next strongest, followed by solid support for Spanish, French, Portuguese, Russian, and Dutch. If your Outlook account contains a mix of languages, SigParser will handle each according to its language support level.