Deliverability & Security

Automated outreach that reaches the inbox.

Volume is what gets cold email filtered — so a2lead is built to send slowly, in plain text, from your own mailbox, only to addresses that have been verified, and only after the message has passed an automated content check. This page describes exactly what the sending engine enforces.

( 01 )
Warm-up

Sender warm-up is staged, not assumed.

A brand-new mailbox that suddenly sends 25 cold emails a day is the single easiest pattern for a spam filter to catch. a2lead ramps new sending accounts instead, and we switch the ramp on per account at onboarding — so tell us when your sending domain has no history.

  • Days 1–3 — around 5 emails per day.
  • Days 4–6 — around 10 per day.
  • Days 7–13 — around 15 per day.
  • Days 14–29 — around 30 per day.
  • Day 30 onward — your full configured daily cap.
  • The ramp never exceeds your configured cap: it only ever lowers the ceiling, never raises it.
( 02 )
Pacing

Volume is throttled at both ends.

Sending limits are enforced when a message is scheduled and again at the moment it is sent, so a delayed queue drains at the correct rate instead of firing everything at once.

  • A minimum five-minute gap between any two sends, plus random jitter so the rhythm is not machine-regular.
  • A maximum of eight emails in any rolling sixty-minute window.
  • Business-hours sending only, in the recipient-facing timezone you configure — no 3 a.m. sends.
  • No more than 60% of your daily volume before midday, so the day is not front-loaded.
  • At most two emails per day to any single recipient domain, so one company never sees a wave.
  • One send per account per worker tick, as a final anti-burst guard.
( 03 )
Content

Every draft passes a hygiene gate before it can be sent.

The gate runs on the AI-written draft before approval, and again immediately before the message hits the SMTP connection. A draft that fails is rejected rather than sent.

  • Spam trigger words in English and Lithuanian are blocked — “free”, “guarantee”, “act now”, “limited time”, “you won”, and their Lithuanian equivalents.
  • Corporate filler is blocked too: “leverage”, “synergy”, “game-changer”, “revolutionize”, “world-class”, “paradigm shift”.
  • Subject lines are rejected if they are empty, over 70 characters, ALL CAPS, or contain emoji, currency symbols, percent signs, or repeated punctuation.
  • Cold emails and follow-ups may contain no links at all, except URLs that belong to your own email signature.
  • No HTML is permitted in the body — a2lead sends plain text only.
( 04 )
Bulk signals

Nothing in the message says “bulk mail”.

Most cold email is filtered not because of what it says but because of how it is packaged. a2lead sends messages that are technically indistinguishable from one a person typed.

  • Plain text, UTF-8, with standard Message-ID, In-Reply-To and References threading headers.
  • No HTML body, no images, no invisible tracking pixel — which is why a2lead reports replies and bounces but deliberately does not report open rates.
  • No List-Unsubscribe header and no unsubscribe footer. These mark a message as a campaign; a2lead outreach is one-to-one.
  • Sent from your own mailbox over your own Gmail or SMTP connection — never from a shared IP pool or a2lead infrastructure.
  • Opt-outs are handled by reading the replies: when someone asks to be removed, the prospect is excluded automatically and no further mail goes out.
( 05 )
List quality

Bad addresses are discarded, not emailed.

Bounce rate is the fastest way to destroy a sending domain. a2lead verifies every address through a third-party verification service before a single word is drafted.

  • Only addresses that come back as deliverable enter the drafting queue.
  • Undeliverable, risky, catch-all, role-based, disposable and full-mailbox addresses are dropped from the pipeline — in practice a large share of sourced contacts are never contacted at all.
  • If a message bounces anyway, the inbound sync detects it, classifies it as a hard or soft bounce, and retires the prospect.
  • Your own exclusion list — existing customers, partners, competitors — is applied at import, at drafting, and once more at send time.
( 06 )
Monitoring

The account is scored continuously, not audited once.

Your dashboard carries a live deliverability panel that grades the sending account from 0 to 100 and labels it healthy, watch, or at risk, with a prioritized list of what to fix first.

  • 7-day reply rate — a collapse here is usually the first sign a domain is being filtered.
  • 30-day bounce rate and hard-bounce count.
  • Out-of-office rate and the share of replies that are negative, complaints, or removal requests.
  • Emails sent today against your configured cap, so overruns are visible immediately.
  • DNS checks on your sending domain for an SPF record, a DMARC policy, and DKIM across the common selectors — anything missing is flagged with what to publish.
  • Concrete remedies, not just numbers: for example, dropping the daily cap to 10 for a week to let a damaged domain recover.
( 07 )
Security

Credentials you can revoke, encrypted at rest.

a2lead needs to send from your mailbox and read replies to it. It needs nothing else, and it is built so you keep control of that access.

  • Gmail and Google Workspace connect through Google OAuth — a2lead never sees or stores your password, and you can revoke access from your Google account at any time.
  • If you connect a mailbox over SMTP/IMAP instead, the password is encrypted at rest with AES-256.
  • Mail is transmitted over TLS.
  • Outreach originates from your own connected account, so your domain and your reputation stay yours.
  • Prospect records are business contact data used to run your outreach. We do not sell personal data, and access, correction or deletion can be requested at any time.

Want it checked against your domain?

We will look at your sending domain's SPF, DKIM and DMARC records and tell you what to fix before you send anything — whether or not you end up using a2lead.

Contact Sales Read the FAQ