Compose Email From an Alias: What Plus and Pro Actually Unlock

Free accounts can mint unlimited forwarding aliases and receive inbound mail, but initiating a brand-new outbound conversation from an alias requires a paid plan. When you initiate a message, the recipient sees only the alias address on the shared emcognito.com domain. For inbox-safety context, FTC phishing guidance recommends treating unexpected messages and requests for personal information with caution.

Every message you compose leaves from your chosen alias rather than your personal mailbox. Outbound sending operates under strict mechanics: every composed message draws against your account's unified monthly forwarding allowance, and outbound volume is governed by a daily send cap that ramps up over your first week. If you are evaluating whether to upgrade or switch from another provider, understanding these limits ensures you pick the right tier for your workflow.

The Short Answer: Composing Is a Paid Feature, and It Shares Your Quota

The ability to compose email from alias addresses is unlocked immediately on Plus and Pro, including during the 7-day free trial. The Free plan allows you to create unlimited durable aliases and receive up to 35 forwarded messages per month, but it cannot initiate new outbound threads. Source: Emcognito source.

Paid tiers unlock outbound composing alongside increased monthly capacity on the pricing page:

• Emcognito Plus: Unlocks outbound composing with a daily limit of 20 sends, provides 2,500 monthly forwarded messages, removes the Free tier's sponsor card, and includes developer API access capped at 50 aliases created per day.
• Emcognito Pro: Expands outbound capacity to 100 composes per day, raises the monthly quota to 15,000 forwards, and lifts the developer API creation limit to 200 aliases per day. Yearly Pro includes three months free compared to month-to-month billing.

Outbound composing and inbound forwarding do not draw from independent buckets. Every time you compose and send a message from an alias, it counts as one send against your overall monthly quota (2,500 on Plus; 15,000 on Pro). Outbound sends and inbound deliveries share the exact same pool.

Daily send caps protect delivery reputation: 20 per day on Plus and 100 per day on Pro. To prevent automated abuse, these caps ramp up gradually across your account's first 7 days. Hitting your daily compose cap blocks further outbound messages for the remainder of the day, but it does not stop inbound forwarding. Incoming emails continue to transit to your primary inbox until your total monthly quota is exhausted.

Why Alias Services Meter Sending and Not Addresses

Minting an email alias is computationally negligible. Storing a forwarding route in a database requires minimal disk space and zero external network bandwidth. This is why Emcognito permits unlimited aliases on every plan, including Free, subject only to a daily abuse safeguard of 200 aliases generated per day from the web dashboard.

Outbound email infrastructure, by contrast, carries ongoing operational expenses. Transmitting mail through internet relays requires maintaining strict sender domain reputation, monitoring IP pools, managing bounce handling, and mitigating spam complaints. A malicious actor generating thousands of outbound messages can burn an IP range or cause major mail providers to throttle the entire domain. Providers therefore meter actual data transit (forwarded and outbound messages) rather than the passive aliases sitting in your routing table.

Unlike temporary or disposable burner services that provide ephemeral inboxes that cannot reliably maintain long-term conversations or send outbound mail, a dedicated forwarding alias is durable. It persists indefinitely, receiving updates and forwarding them onward. When comparing services, determine where your bottleneck lies: are you running out of address slots, or are you running out of inbound and outbound message volume?

What You Get When You Compose Email From an Alias

When you initiate an outbound message, the recipient sees only the alias address on the shared emcognito.com domain. The underlying mailbox you use to manage your account remains completely invisible. The alias hides your real address from the sender, maintaining a clean barrier between your private identity and external correspondents.

Paid accounts unlock additional operational features absent from the Free plan:

1. Outbound Composition: Available immediately when starting the 7-day trial. You can test routing reliability and deliverability to external systems prior to your first billing cycle.
2. Direct Mail-App Replies: When a forwarded email reaches your personal inbox (whether you use Apple Mail, Outlook, or Gmail), hitting Reply sends your response back through Emcognito's mail relays. Emcognito swaps the headers so the outgoing message originates from your alias. To prevent unauthorized spoofing, the system accepts replies only if they originate from your registered sign-in mailbox, achieve an SPF pass under IETF RFC 7208, and carry an aligned DKIM signature under the standards outlined in IETF RFC 6376. Each mail-app reply consumes one send from your monthly quota. Note that messages forwarded prior to October 5, 2026, do not contain the necessary routing metadata and lack a private reply address.
3. Clean Footers: Free accounts append a small, clearly labelled sponsor card to the bottom of forwarded emails. Upgrading to Plus or Pro strips this footer entirely.

On Plus and Pro you can hit Reply in your own mail app (Gmail, Outlook, Apple Mail) on a forwarded message, and Emcognito sends the reply from the alias. It is accepted only from the mailbox you sign in with, and each reply uses one monthly send. On Free, replying from your mail app is a Plus feature; Free accounts can reply from the delivery log with Reply securely until November 3, 2026, after which Reply securely is Plus and Pro only.

Emcognito strips tracking pixels (the tiny hidden images that report when you open a message) from forwarded mail on every plan, Free included. It does not remove scripts or rewrite links and does not scan for malware.

Two Ways to Send: Web Dashboard vs Native Mail App

When you need to send mail from an alias on Plus or Pro, you have two distinct mechanisms depending on whether you are starting a fresh conversation or replying to an incoming email.

1. Composing a Brand-New Message (Dashboard Web Interface)

To initiate a new thread where the other party has not emailed you first, navigate to your Emcognito dashboard. Locate the specific alias you wish to send from, click the compose action, and enter the recipient address, subject line, and message body.

Because the web interface initiates the transmission directly on Emcognito's mail relays, it does not rely on your personal email client's local configuration. The message headers are generated with the alias in the From field. When the recipient hits reply, their response routes back to the alias, passes through Emcognito's inbound pipeline, and forwards directly to your sign-in mailbox.

2. Replying to an Existing Thread (Direct Mail-App Integration)

If someone has already sent an email to your alias, you do not need to log into the web dashboard to answer them. When the email forwards to your inbox, Emcognito constructs a reverse routing address hosted on reply.emcognito.com.

In your everyday mail client (such as Apple Mail on macOS, Outlook on Windows, or Gmail on the web), you simply click standard Reply. Your email client sends your text to that routing address. When Emcognito receives it, the system performs cryptographic authentication:

• It confirms the incoming connection originates from your primary registered sign-in mailbox.
• It validates that SPF passes under RFC 7208.
• It checks that the message carries a valid, aligned DKIM signature matching your primary mail domain under RFC 6376.

Once verified, the relay rewrites the message headers, setting the alias as the visible sender, and relays the message to the original recipient via standard transport relays. If an unauthorized mailbox attempts to send to that reverse routing address, or if authentication fails, the relay rejects the submission. On Free accounts, attempting to reply directly from your mail app triggers an automated delivery failure notice explaining that mail-app replies require a paid tier.

Managing the Daily Ramp-Up and Monthly Quotas

Users who need to compose email from alias addresses often wonder how the daily limits interact with monthly allocations. Understanding these boundaries prevents unexpected interruptions when managing critical accounts.

On both Plus and Pro, your compose capability ramps up across the first seven days of your subscription. This throttle applies strictly to outbound compositions to prevent bad actors from registering trial accounts to blast spam. The ramp-up schedule scales your daily allowance from a baseline fraction up to the plan ceiling:

It is vital to recognize the difference between daily caps and monthly limits. Daily caps govern the maximum burst of initiated compositions allowed within a 24-hour UTC window. Hitting your daily limit halts outbound sends for the rest of that day, but inbound messages continue forwarding without delay.

The monthly quota, by contrast, is a shared aggregate pool covering both inbound forwards and outbound sends (including both web composes and mail-app replies):

• On Plus, you receive 2,500 total messages per month. For example, if you compose 100 outbound messages in a month, you have 2,400 forwards remaining for inbound traffic.
• On Pro, you receive 15,000 total messages per month. Even heavy outbound senders rarely exhaust this threshold alongside normal forwarding.

Because many forwarding accounts process minimal monthly volume once set up, the standard Plus allocation comfortably covers typical personal workflows. If you manage active customer inquiries or outbound correspondence across dozens of discrete aliases, Pro ensures you avoid throttling.

Domain Architecture and Technical Boundaries

Emcognito aliases use the shared emcognito.com domain. Custom subdomain support is planned, but custom domains are not available today.

Operating on a shared domain provides specific privacy advantages. Because thousands of active aliases share the same root domain namespace, external tracking networks cannot correlate your activity across different web services based on domain ownership records. However, this model also requires Emcognito to enforce strict operational standards:

• Delivery Architecture: Emcognito operates standard Postfix transfer agents relaying through Amazon SES. Mail transits encrypted over TLS in transit. Emcognito forwards mail over TLS-encrypted transport and does not read message contents or retain them after delivery, apart from a brief hold on mail that arrives over your monthly forward cap, but it is not end-to-end encrypted. For content confidentiality, pair it with an encrypted mailbox such as Proton Mail or Tuta.
• Zero-Knowledge Boundaries: Emcognito is not a zero-knowledge service. It does not read or analyse message contents, or retain them after delivery, apart from a brief hold on mail that arrives over your monthly forward cap, but it necessarily handles mail in readable form in order to deliver it.
• Data Retention and Logging: Emcognito collects no personal information beyond a destination address and does not retain message bodies after delivery, apart from a brief hold on mail that arrives over your monthly forward cap, but it keeps the delivery and operational logs any mail service needs. That is data minimisation, not a no-log policy.
• Source Code and Hosting: Emcognito is closed source and runs only as a hosted service; if open source or self-hosting is a requirement, addy.io is the better fit.

Understanding these boundaries ensures you deploy aliases effectively. For standard newsletter signups, retail accounts, customer support communications, and leak tracing, the shared domain architecture provides robust isolation without managing external DNS records.

Programmatic Alias Management via the Developer API

For developers who automate infrastructure, testing pipelines, or personal scripts, both Plus and Pro include programmatic access to the Emcognito REST API. The API is documented at emcognito.com/developers.

The API surface is intentional and lightweight. Version 1 exposes two endpoints under the base URL https://api.emcognito.com/v1:

• GET /v1/aliases: Lists existing aliases with pagination using next_cursor or last_key.
• POST /v1/aliases: Creates a new alias. Accepts an optional JSON body containing label, note, source, category, single_use, and expires_at.

Authentication requires a Bearer token in the Authorization header using your API key. The key format begins with the literal prefix emk_ followed by 43 URL-safe characters (for example, emk_your_key). There is no live or test environment split.

POST /v1/aliases returns HTTP 200 with the new alias under "alias". The burst limit is 60 requests a minute per key; its 429 carries a Retry-After header giving the seconds until the window resets. The daily alias-creation cap (50 on Plus, 200 on Pro) resets at 00:00 UTC and its 429 carries no Retry-After. Emcognito sends no X-RateLimit-* headers.

v1 of the Emcognito API creates and lists aliases (GET and POST /v1/aliases). Suspending, resuming and deleting an alias are one-click dashboard actions today; there is no PATCH or DELETE endpoint yet. Pausing an alias immediately shuts off incoming forwards, isolating any address that has been leaked or sold to third-party brokers.

Frequently Asked Questions

Can I compose email from alias addresses on the Free plan?

No. Free accounts can reply to forwarded messages using the Reply securely feature in the delivery log until November 3, 2026, after which all reply capabilities become exclusive to Plus and Pro.

How does hitting my daily compose limit affect incoming email?

Hitting your daily compose cap (20 per day on Plus; 100 per day on Pro) prevents you from sending additional outbound messages for the remainder of that UTC day. However, it does not disrupt your inbound mail. Incoming forwarded messages continue delivering normally to your personal inbox until your overall monthly quota (2,500 on Plus; 15,000 on Pro) is reached.

Do outbound messages reveal my personal email address in the headers?

No. When you send mail from an alias, whether through the web dashboard compose window or via mail-app replies on Plus and Pro, Emcognito's mail relays replace your personal email headers. The recipient sees only the alias address on emcognito.com. The underlying address where you receive forwarded mail is never exposed to the recipient.

Why does my reply from Gmail or Apple Mail fail to send?

On Plus and Pro, direct mail-app replies require that the outgoing response originates from the exact primary email address registered to your Emcognito account. Additionally, your mail provider must achieve SPF alignment under RFC 7208 and provide a valid DKIM signature under RFC 6376. If you send the reply from an unlinked alias, a secondary address, or a mailbox with failing authentication, Emcognito rejects the transmission to prevent address spoofing. On Free plans, direct mail-app replies are unavailable and will bounce with an upgrade notification.

What happens if an alias I composed from receives a bounce or rejection?

If an external mail server rejects a message you composed from an alias (due to a non-existent recipient address or external spam filtering), the non-delivery report routes back to Emcognito's relay. Emcognito forwards the bounce notice directly to your primary inbox so you know the delivery failed. The failed transmission still counts against your daily compose cap and monthly quota.

Can I use a custom domain when composing outbound email?

Emcognito aliases use the shared emcognito.com domain. Custom subdomain support is planned, but custom domains are not available today.

Does starting a 7-day free trial grant immediate compose access?

Yes. When you start a 7-day free trial of Plus or Pro, outbound composing is unlocked immediately. You add a payment card at checkout, but nothing is charged until the trial concludes.

How do I shut off an alias if it begins receiving spam?

If a service leaks your alias or begins sending unsolicited marketing, you can shut it off instantly. In your Emcognito dashboard, click Pause alias on that specific address. All incoming messages sent to a paused alias are immediately dropped at the relay, severing the sender's access to your primary inbox without affecting any of your other aliases.

Choosing the Right Next Step

For individuals seeking durable per-site aliases, outbound composition, and direct mail-app replies, review plan options on the pricing page to unlock composing new mail from any alias.