The best email integration for your CRM, without the busywork
Connect Gmail, Microsoft 365, and your transactional sender to the CRM your team already lives in. Two-way sync, threaded replies, shared inboxes, deliverability signals, and audit-ready logs on every send.
Email is the primary communication channel for almost every revenue team on earth. It is also the single most siloed one. Buyers reply to a rep, the thread lives in that rep inbox, the CRM shows a stale task from last Tuesday, and the next person to touch the account has no idea what was already promised. The pain is not the sending. The pain is everything that happens when the send is not written back to the record that pays for the seat. The pattern repeats across every revenue team: six tools claim to integrate with Gmail or Microsoft 365, two actually sync both directions, one of those drops threading on reply, and the last one requires a browser extension that half the laptops in the company refuse to install. The result is a pipeline view that is always a few hours behind reality, a shared inbox that nobody really owns, and a handoff story that depends on whichever rep remembers to forward the right thread to the right person before the deadline. The right email integration should not be a feature the admin sells to the team. It should be invisible to the rep, exhaustive to the admin, and complete enough on the record that nobody has to go hunting through an archive to answer a question that the pipeline should already know.
Silo
Inboxes do not talk to records
Reps live in Gmail or Microsoft 365 all day. Managers live in the CRM. When the two surfaces are not synced in real time, the pipeline you report on and the pipeline that is actually moving are two different pipelines.
One-way sync
Logging is not integration
BCC-to-CRM and inbound-only forwarding are logging, not integration. They skip replies, drop attachments, break threading, and never surface the record on the compose screen where reps actually work.
Shared inboxes
Shared mailboxes get messy fast
sales@, support@, and billing@ aliases pile up. Multiple reps claim the same thread, replies cross over, and nobody owns the SLA. A real integration routes threads to the right owner and keeps a single assignment record.
Deliverability
Blasts tank your domain
Sending cold outbound from the same domain that bills your paying customers hurts transactional delivery. The right integration separates lanes, warms subdomains, and watches the signals before you tank your sender score.
Compliance
A2P, CAN-SPAM, and audit logs
Unsubscribe handling, consent tracking, and bounce suppression need to live inside the CRM, not inside a marketing tool that nobody opens on Tuesdays. One source of truth or you will send to the wrong contact.
Templates
Mail-merge that reads your data
The whole point of a CRM is that it knows the account, the owner, the stage, and the last touch. Templates that cannot read those fields are glorified canned responses. Real merge pulls from any field, any custom object, any step in the flow.
Providers in Strkr
Email integrations available today.
Strkr ships first-class email integrations for the senders your team actually uses: Gmail for Google Workspace tenants, Microsoft 365 for Exchange Online tenants, and transactional senders for the automated side of the house. Every provider below ships with OAuth or API-key install, encrypted credential storage, and the same two-way sync primitives. The provider list is intentionally short. Most CRM shoppers do not want sixteen choices with different sync depths. They want the two inbox providers their team already runs, plus one or two transactional pipes for the automated side, all installed in minutes rather than days. If your team runs on Google Workspace, Gmail covers the human lane. If your team runs on Microsoft 365, Exchange Online covers the human lane. Either way, a dedicated transactional sender covers the automated lane so your reputation stays clean when your marketing team ships a campaign.
Most CRMs ship something they call email integration and most of them stop at logging the outbound. A real integration is a nine-point surface: it syncs both directions, it threads replies, it routes shared inboxes, it respects signatures, it reads custom fields in merge, it suppresses on unsubscribe, it watches deliverability, it ships compose inside the record, and it keeps an audit log for every byte that crosses the wire.
Two-way sync
Inbound and outbound in one pipe
Replies from the buyer land on the record automatically. Outbound sent from the inbox lands on the record automatically. No BCC, no forwarding address, no manual logging button. The CRM and the inbox stay in lockstep.
Threading
Threads stay whole
The whole conversation threads under one record view, in-order, with every reply, forward, and quoted history preserved. No orphan replies hiding under a different contact because the From changed one letter.
Shared inbox
Aliases with real ownership
Route sales@ and support@ aliases to the right owner by rule, round-robin, or load. One rep per thread, one assignment of record, and a clean handoff when the owner changes or goes OOO.
Attachments
Attachments on the record
Every attachment, inline image, and quoted file lands on the record and the related activity. Searchable, scoped to the account, and never dropped on a 25 MB message that the logger silently skipped.
Compose in context
Compose inside the CRM
Open a contact, hit reply, send from the inbox you are signed into. The record, the owner, the stage, and every custom field are all available to the compose window and every template that runs through it.
Signatures
Per-rep signatures that render right
HTML signatures survive the round-trip, inline logos render, and legal footers get appended by rule. No signature stripping, no plain-text collapse, no awkward double footer when the rep already has one.
Suppression
Unsubscribes stop the next send
The moment a contact unsubscribes, the record carries the flag, every flow refuses to send, and every rep template shows a visible banner on the compose screen. The suppression lives on the contact so it survives list changes, segment edits, and template reuse.
Audit
Every send is receipted
Every outbound carries a signed audit entry on the contact and on the activity log. Message ID, template version, from-address, merge payload, and delivery event all land on the record. If anyone ever asks what was sent, the answer is one search away.
Gmail and Outlook
How Strkr integrates with Gmail and Microsoft 365
For Google Workspace tenants, Strkr integrates with Gmail over the Google OAuth flow with the gmail.modify scope. For Microsoft 365 tenants, Strkr integrates with Exchange Online over Microsoft Graph with Mail.ReadWrite and Mail.Send scopes. Both flows ship the same user experience: install once per user, consent to the exact scopes, and start syncing on the next poll. Nothing about mailbox rules, no insecure IMAP app passwords, no agent that has to run on a laptop.
OAuth install
Per-user consent, revocable anytime
Each rep installs the integration with their own OAuth consent. Admin controls which scopes are available at the tenant level. Any rep can revoke in two clicks, and tokens are stored encrypted at rest.
Scopes
Read, send, modify, and label
The integration reads messages, sends on behalf of the user, labels threads for CRM-synced correspondence, and modifies read state when a rep opens a thread from the record view. No contact-list scraping, no password-level access.
Webhooks
Push, not poll, for new messages
Gmail push notifications and Microsoft Graph change notifications fire the second a new message hits the mailbox. The CRM record updates within seconds, not every fifteen minutes on a polling job.
Mailbox rules
Rules stay with the mailbox
Strkr does not fight your Gmail filters or your Outlook rules. The integration respects what you already set up, syncs on top of it, and surfaces anything the rule box moved to a sub-label or sub-folder.
Multi-mailbox
More than one inbox per rep
A rep might run a personal mailbox and a shared alias. The integration binds any number of mailboxes to a user, routes based on which inbox was involved in the thread, and keeps the correct from-address on reply.
Signatures
Native signatures preserved
The Gmail or Outlook signature the rep already set up renders exactly the same inside the CRM compose window. No duplicate signature, no stripped HTML, no awkward reset of a thirty-rep standard.
Threading
Reply-to and references respected
The integration honors RFC-5322 In-Reply-To and References headers so threads stay whole across clients. A buyer who replies from an iPhone, a laptop, and a web client all lands on the same thread, same record.
Admin controls
Tenant-wide guardrails
Admins choose which scopes install, which users can turn on the integration, and which domains are allowed to send on behalf of the tenant. Install is self-serve, oversight is central, and nothing escapes the policy you set at the top.
Transactional and bulk
Transactional senders, deliverability, and the second lane
Not every email is a rep reply. Order confirmations, password resets, bounce notices, invoice receipts, and automated nudges should not go out of a rep mailbox. They should go out of a transactional sender with its own domain, its own warm-up curve, and its own deliverability metrics. Strkr integrates with the two most common transactional pipes so your automated email never fights your human email for sender reputation.
Second lane
Separate transactional from human
Mail that is sent by a flow goes through the transactional sender. Mail that is sent by a rep goes through the rep inbox. Two subdomains, two warm-up curves, two reputations. One domain health posture that does not blow up on a Tuesday.
API-key install
Credentials in the vault, not the code
Transactional senders install over API key. The key is stored encrypted at rest, never printed in logs, and revocable in-app. BYO sender means your reputation stays your reputation if you ever change vendors.
DKIM and SPF
Domain auth you can actually verify
The install wizard checks DKIM, SPF, and DMARC records for the sending domain and tells you exactly what to fix. No more guessing why Gmail is clipping or Outlook is routing to Clutter on the receiving side.
Bounces
Hard bounces write back
Every hard bounce writes a suppression record to the contact. The next flow that would send to that address stops at the gate. No more hammering a dead address until the receiving domain blocks the whole subdomain.
Unsubscribes
One-click unsubscribe honored everywhere
List-Unsubscribe and the Gmail one-click header are honored on every automated send. The unsubscribe flows back to the contact and is enforced across every future flow, every sender, every list.
Templates
Transactional templates with real merge
Transactional templates read any CRM field, any custom object, any computed value from the flow. A receipt email can include line items from a quote, the owner signature, and the account logo without a middleware layer in between.
Audit log
Every send, logged
Message ID, timestamp, template version, recipient, from-address, and delivery event all land on the contact and on the audit log. If legal asks what you sent on March 11, you can produce the exact message in under a minute.
Deliverability
Signals before the trouble
Spam complaint rate, inbox placement, bounce curve, and reputation score are visible before the receiving domain starts blocking you. The dashboard warns at the second standard deviation, not after the Monday morning triage round.
Compliance and controls
Keeping the regulators and the auditors happy
Email is a regulated channel. CAN-SPAM in the United States, CASL in Canada, GDPR in the EU, and PECR in the United Kingdom all have teeth, and the enforcement cycle is quietly getting shorter every year. A CRM-grade email integration treats consent, retention, suppression, and audit log as first-class data on the contact. Nothing lives in the sender dashboard that does not also live on the record. Nothing gets sent to a contact who has not been scoped against the right legal basis.
Consent
Legal basis on the contact
Every contact carries a legal basis field (consent, legitimate interest, contract, or none). Templates and flows refuse to run against a contact whose basis is missing or revoked. The audit log keeps who set the basis and when they set it.
Suppression
One suppression list, every pipe
Hard bounces, complaints, and unsubscribes all land on the same suppression list. The list is enforced in Gmail sends, Microsoft 365 sends, and transactional sends. There is no accidental re-send through a different pipe because the suppression lives on the record, not on the sender.
Retention
Retention rules on message bodies
Retention policies can trim message bodies on a schedule while keeping the metadata on the record for pipeline analytics. Legal gets its retention floor, operations gets its pipeline math, and nobody is holding onto a decade of forwarded invoices by accident.
Audit log
Who sent what, when, from where
Every send writes a signed audit entry with the sender, the template, the merge values, the from-address, and the client IP. The log is export-ready, retention-tagged, and searchable by contact, by owner, by campaign, and by time range.
Encryption
Credentials in a managed vault
OAuth tokens for Gmail and Microsoft 365, API keys for transactional senders, and SMTP credentials for any legacy pipe are all stored encrypted at rest with managed keys. Nothing is checked into source, nothing is printed in logs, and nothing survives a user leaving the tenant.
Access
Who can see what mail
Role-based access decides who can read whose email on which record. Reps see their own threads. Managers see their team. Admins see the tenant. External users with portal access see only the mail that explicitly belongs to their account view.
Residency
Data stays where it should
Message bodies and attachments live in the primary tenant region. Metadata (sender, recipient, timestamp, status) ships to the analytics store on the same region. Cross-region replication is explicit, auditable, and governed by the tenant admin, not the integration.
Record visibility
Private threads stay private
Not every email on an account should be visible to every rep on the account. Private flags, redacted previews, and partner-only tags all live on the thread. Managers get full visibility, individual contributors see only what their role is cleared for.
Deliverability review
A monthly health check
The admin dashboard surfaces a monthly deliverability review across both the human lane and the transactional lane. Complaint rate, hard-bounce trend, inbox placement by major receiver, and reputation score by subdomain all land in one view the first Monday of the month.
Connect your inbox, keep your pipeline whole
Install the Gmail or Microsoft 365 integration in a minute, bring your own transactional sender, and start every reply, every thread, and every automated send on the record where it belongs.
The best email integration for a CRM is the one that is two-way, threaded, and native to the inbox your team already uses. For Google Workspace that means Gmail over OAuth with push notifications. For Microsoft 365 that means Exchange Online over Microsoft Graph. For automated and transactional email that means a dedicated transactional sender on a separate subdomain so your human email and your automated email never share a reputation. Strkr ships all three out of the box.
What is the difference between one-way and two-way email sync?
One-way sync, often called BCC-to-CRM or forward-to-CRM, only logs the outbound side of a conversation. Replies stay in the rep inbox and never make it to the record. Two-way sync watches both directions, writes inbound replies to the contact as they arrive, writes outbound sent from the inbox as they go out, preserves threading, and keeps attachments on the record. If your current CRM only logs the send, you are not integrated, you are archiving.
Do I need to switch my email provider to use Strkr?
No. Strkr integrates with the email provider you already use. Gmail for Google Workspace tenants and Microsoft 365 for Exchange Online tenants are both supported with native OAuth installs. For transactional email you can bring your own account at Resend or SendGrid and point Strkr at it with an API key. Nothing about the integration asks you to migrate mailboxes, change MX records, or move anyone off their current inbox.
How do shared inboxes work in Strkr?
Shared aliases such as sales@, support@, and billing@ are first-class in Strkr. Install the alias once as a shared inbox, pick a routing rule (round-robin, load-balanced, by segment, by language, or by any custom rule), and every thread lands on a single owner. The owner can reassign, hand off at the end of a shift, or escalate without losing the thread history. The CRM holds the one authoritative owner-of-record for every conversation.
How does Strkr protect my sending domain reputation?
Strkr separates human email from automated email. Replies from reps run through the rep inbox on your primary domain. Automated flows run through a transactional sender on a separate subdomain. Each lane warms up on its own curve, each has its own bounce and complaint feedback loop, and the two reputations never contaminate each other. The deliverability dashboard watches bounce rate, complaint rate, inbox placement, and sender score, and warns before the receiving domain starts rejecting mail.
Can Strkr send bulk marketing email?
Strkr sends campaign email through the Marketing module and transactional email through flows, both using the transactional sender you bring. For true bulk sends over tens of thousands of recipients at once, teams usually run a dedicated email marketing platform on top. Strkr still writes every send, open, reply, bounce, and unsubscribe back to the contact so the pipeline view stays complete regardless of which pipe actually delivered the message. The pipeline view does not care which tool actually dropped the bytes on the wire. It cares that the activity, the suppression, and the next-step signal all land on the right record on time.
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