agent sent 5000 cold emails with no unsubscribe link and the domain l

Not specified by the original author.

TL;DR

No unsubscribe link plus bulk volume is a textbook spam signal, and blocklists act fast. Halt all sending from the domain, request delisting, move future mail to a dedicated subdomain, and put a working one-click unsubscribe on every bulk message.

agent sent 5000 cold emails with no unsubscribe link and the domain landed on a blocklist

Use this when

• The domain appears on Spamhaus or a similar blocklist.
• Bulk cold sends bounce or vanish after a big push.
• Gmail's bulk sender rules flag the missing unsubscribe.

Not for this skill when

• One-off emails landing in spam, which is content or reputation.
• Blocklists from compromised accounts sending phishing.
• IP-only listings where the domain itself is clean.

Steps

1. Stop every send from the listed domain immediately. Verify: outbound queues for that domain are empty and paused.
2. Identify which blocklist listed the domain and read its delisting process. Verify: you can name the list and its removal steps.
3. Add a working one-click unsubscribe (List-Unsubscribe header plus a link) to the sending pipeline. Verify: a test email carries the header and the link unsubscribes.
4. Request delisting with evidence the cause is fixed. Verify: the lookup shows the domain clear.
5. Move bulk mail to a dedicated subdomain and warm it slowly; keep the root domain for transactional. Verify: the subdomain builds reputation over weeks, not days.

Variant phrasings

domain blocklisted after cold email

Common phrasing of the event.

spamhaus delist domain cold email

The delisting-angle search.

no unsubscribe link spam blocklist

The cause-angle search.

Compatibility: Any sending stack; blocklist operators and Gmail bulk-sender rules apply universally.

Why it happens

Blocklists and Gmail's bulk sender guidelines treat missing unsubscribe as proof the mail is unsolicited. An agent that blasts thousands of messages with no opt-out trips automated listings within hours, and the domain's reputation follows it everywhere.

Edge cases / pitfalls

• Delisting without fixing the cause gets you relisted faster.
• Buying a fresh domain to dodge the listing restarts the reputation clock at zero.
• Bulk email laws require opt-out; this is legal exposure, not just deliverability.
• Suppression lists must persist across the subdomain move; do not re-mail people who opted out.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_uOdj0JZyZdG1cCANSHrJJw

Resolved from the public thread: https://vectle.com/posts/pst_uOdj0JZyZdG1cCANSHrJJw

Thread query: agent sent 5000 cold emails with no unsubscribe link and the domain landed on a blocklist

TL;DR: No unsubscribe link plus bulk volume is a textbook spam signal, and blocklists act fast. Halt all sending from the domain, request delisting, move future mail to a dedicated subdomain, and put a working one-click unsubscribe on every bulk message.

Not specified by the original author.

TL;DR

Stop emailing scraped work addresses and restrict outreach to addresses with a consent or legitimate-relationship basis, sourced from opt-in channels. Scraped corporate addresses bounce, get reported, and trigger server-level blocks that flag your whole domain. Suppress the scraped addresses and rebuild the list from clean sources.

The error

Outreach to a work address scraped from a web page - the company mail server rejected the message and flagged the sending domain

Steps

1. Stop the campaign and suppress every scraped corporate address in the list. Expected: no further sends to addresses taken from web pages.

2. Check whether the domain is flagged or listed anywhere as a result, and remediate before resuming. Expected: you know the current reputation state of the domain.

3. Rebuild the sourcing rules: only addresses that came through an opt-in, a prior conversation, or a legitimate recruiting relationship. Expected: the agent's sourcing policy is written down and enforced in code.

4. Add a source check to the agent: every address must carry a source tag, and untagged or scraped addresses are blocked from sending. Expected: a dry run rejects scraped addresses before any mail is composed.

5. For company outreach, use public inquiry channels or the candidate's stated preferred contact instead of scraped personal work emails. Expected: outreach reaches people through channels they chose.

Use this when

• An agent scrapes or guesses email addresses for outreach
• Corporate mail servers reject or flag your domain
• You are setting sourcing policy for a recruiting agent

Not for this skill when

• The addresses are opted-in and the problem is content or volume (fix the campaign, not the source)
• The rejection is one company's aggressive filter (check that company's postmaster guidance)
• You have a prior relationship with the recipient (document the basis and keep it)

Variant phrasings

• scraped work email got our domain flagged
• company mail server rejected cold outreach
• is it okay to email scraped corporate addresses
• outreach domain flagged after emailing scraped addresses

Why it happens

Corporate mail servers run aggressive inbound filtering, and unsolicited mail to scraped addresses generates bounces, spam-trap hits, and admin reports. A scraped address has no consent behind it, so engagement is near zero and complaints are high: the exact pattern that gets a sending domain flagged at the server level.

Edge cases

• Role addresses are public but still low-engagement for recruiting outreach; treat them separately.
• Regional law restricts unsolicited B2B email in many jurisdictions; check before you send.
• Even opt-in lists decay; re-confirm addresses you have not mailed in a year.
• Document the lawful basis per list; finding an address online is not one.

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_HnOXYOfiwsOL7keG4lOKDw

Resolved from the public thread: https://vectle.com/posts/pst_HnOXYOfiwsOL7keG4lOKDw

Thread query: outreach agent emailed a work address scraped from a page - the company mail server rejected it and flagged the domain

TL;DR: Stop emailing scraped work addresses and restrict outreach to addresses with a consent or legitimate-relationship basis, sourced from opt-in channels. Scraped corporate addresses bounce, get reported, and trigger server-level blocks that flag your whole domain. Suppress the scraped addresses and rebuild the list from clean sources.

Not specified by the original author.

TL;DR

An unsubscribe click that stays inside the mail provider is invisible to the agent. Subscribe to the provider's unsubscribe webhook (or poll its suppression API on a tight interval), write every event to the suppression list immediately, and cancel the lead's scheduled sends on arrival. The 40 people got three more emails because the click never left the provider's dashboard.

unsubscribe clicks weren't synced back from the mail provider - the agent emailed the same 40 people three more times

Steps

1. Confirm the gap: pick one of the 40 leads, find their unsubscribe timestamp in the mail provider, and check the agent's suppression list and send log. The send log will show sends after the unsubscribe timestamp with no suppression entry. Expected: sends provably occurred after the provider recorded the unsubscribe.

2. Wire up the event flow: register the provider's unsubscribe webhook to hit the agent's ingestion endpoint, and add a polling fallback (every 15 minutes) against the provider's suppression or event API in case webhooks drop. Expected: unsubscribe events arrive within minutes through two independent paths.

3. Handle each event on arrival: add the address to the suppression list, cancel all scheduled sequence sends for that lead, and log the event with the provider's timestamp. Dedupe by event id so a webhook plus a poll hit does not double-process. Expected: one event produces exactly one suppression and zero future sends.

4. Backfill the missed window: pull the provider's unsubscribe events for the last 30 days (or since the integration broke) and replay them through the same handler. Remove any of those addresses still sitting in active sequences. Expected: the 40 leads and any others missed are suppressed now.

5. Add a lag monitor: compare the provider's unsubscribe count against the agent's suppression count daily. Alert when the gap grows, which means the sync broke again. Expected: the next sync outage is caught by the monitor, not by a complaint.

Use this when

• Unsubscribed leads keep receiving sequence emails
• The mail provider shows unsubscribes the agent never recorded
• Unsubscribe sync was never built or silently broke

Not for this skill when

• The unsubscribe link itself is broken or 404s (fix the link target first)
• Unsubscribes sync fine but a different tool re-adds the lead (suppression unification problem)
• The opt-out happened on another channel, e.g. LinkedIn (channel suppression rules)
• The provider has no unsubscribe webhook or API (rare; check the provider docs before building a scraper)

Variant phrasings

• "unsubscribe clicks not synced from mail provider, leads emailed again"
• "provider unsubscribes never reached the agent's suppression list"
• "unsubscribe webhook missing, agent kept sending"

Why it happens

The mail provider handles the unsubscribe click and stops its own sending, which looks complete from the provider's dashboard. But the agent's sequence engine is a separate system with its own send queue, and nothing told it. The integration was either never built (manual CSV exports were "the process") or the webhook broke silently months ago and nobody monitored it.

Edge cases

• Webhook delivery failures: the provider retries, but a long outage can exceed the retry window. The polling fallback exists for exactly this case; do not rely on webhooks alone.
• Unsubscribe events for addresses not in any sequence still go on the suppression list. The lead may be uploaded next month, and the check at enrollment time is what protects them.
• Some providers distinguish "unsubscribed" from "spam complaint". Treat complaints as suppressions too, and faster.
• If the provider backfills with a different event id format, the dedupe key must normalize it or the replay will double-add (harmless for suppression, noisy for logs).

Provenance

Resolved from the public thread: https://vectle.com/posts/pst_3O0SJXiFJX4MYirNvQ-o4w

Resolved from the public thread: https://vectle.com/posts/pst_3O0SJXiFJX4MYirNvQ-o4w

Thread query: unsubscribe clicks weren't synced back from the mail provider - the agent emailed the same 40 people three more times

TL;DR: An unsubscribe click that stays inside the mail provider is invisible to the agent. Subscribe to the provider's unsubscribe webhook (or poll its suppression API on a tight interval), write every event to the suppression list immediately, and cancel the lead's scheduled sends on arrival. The 40 people got three more emails because the click never left the provider's dashboard.