Cold email on Instantly, run by a team that protects your reputation.

Instantly is a cold email platform built for outbound sales and lead generation. It lets you connect many sending mailboxes, warm them up automatically, rotate sending across them and run multi-step email sequences to prospect lists. It also includes a unified inbox for replies, analytics and a lead database. B2B companies, agencies and sales teams use it to start conversations with potential customers at a volume that would be impossible to manage from a single inbox, while keeping deliverability under control.

An Instantly agency sets up and runs your cold email programme on the platform. At Vertical that means defining your ideal customer profile, buying and configuring sending domains, authenticating and warming mailboxes, building and verifying lead lists, writing sequences, managing replies and reporting on meetings and pipeline. Rather than learning the platform and the craft of outbound from scratch, you get a senior team that has already made the mistakes and knows how to keep your domains healthy while the campaigns perform.

B2B cold email can be lawful in the UK when it is done responsibly. Under PECR, emailing corporate subscribers is treated differently from emailing individuals, and UK GDPR requires a legitimate interest, clear information about who you are and an easy way to opt out. We target relevant business contacts, keep messages relevant to their role, include clear opt-out handling and respect every unsubscribe. We are not lawyers, so for specific situations we recommend you take your own legal advice.

We never send cold email from your main company domain. Instead we set up secondary domains that look and feel like your brand, each with a small number of mailboxes, properly authenticated with SPF, DKIM and DMARC. Every mailbox is warmed up before campaigns start, sending limits stay conservative and Instantly rotates volume across accounts. We monitor bounces, spam placement and reply signals continuously, and rest or replace domains when needed, so your primary domain and its reputation are never put at risk.

Inbox rotation spreads your outbound volume across multiple sending mailboxes instead of pushing everything through one account. Each mailbox sends a modest number of emails a day, which looks natural to inbox providers and keeps reputation healthy. Instantly handles the rotation automatically within a campaign. It means you can reach more prospects without overloading any single sender, and if one mailbox needs a rest, the rest of the campaign carries on without interruption. We size the number of mailboxes to the volume you need, never the other way round.

New domains and mailboxes need time to build a sending history before they can carry cold campaigns. Instantly’s warm-up network sends and replies to emails automatically to establish that reputation. We typically let mailboxes warm for a few weeks before launching, then increase volume gradually. Rushing this step is one of the most common reasons outbound fails, so we plan for it from the start and use the time to build lists and write and approve sequences. Patience at this stage pays for itself many times over in the months that follow.

We build lists around your ideal customer profile using reputable B2B data sources, including Instantly’s own lead database where it fits, then verify every email address before it is uploaded. We filter by industry, company size, role, location and relevant triggers such as hiring or funding news. Verification removes invalid and risky addresses, which keeps bounce rates low and protects your domains. If you already have target account lists, we work from those and enrich them with the contacts and context we need to write relevant emails.

Good cold email is short, specific and about the reader. We research your market, understand the problems your best customers had before they bought, and write plain-text emails that make one clear point and ask one easy question. Personalisation goes beyond first names to role, industry and timely triggers. We test different angles, subject lines and follow-up timings, keep what earns positive replies and retire what does not. Every sequence is reviewed by a senior writer before it is sent.

Yes. Instantly integrates with CRMs such as HubSpot and Pipedrive, either natively or through tools like Zapier and webhooks. We set it up so interested leads, replies and booked meetings flow into your CRM with the right owner and stage, and so contacts already in active deals are excluded from outreach. That keeps your sales team working from one source of truth and means outbound results can be measured in pipeline and revenue rather than in sends. We also set up reply handling so the right salesperson is notified the moment a prospect shows interest.

We focus on outcomes that matter to the business: positive replies, meetings booked, opportunities created and pipeline value. Alongside that we track the health metrics that keep campaigns sustainable, such as bounce rate, spam placement and reply sentiment. Open rates are less reliable than they used to be, so we treat them as a rough signal only. You get regular reporting in plain language, covering what worked, what changed and what we are testing next. That way you can judge outbound on the same terms as every other channel you invest in.

All three are capable cold email platforms, and the right choice depends on your team and how you sell. Instantly is strong for scaling sending across many mailboxes with a simple interface and built-in lead data. Lemlist leans into personalisation and multichannel steps such as LinkedIn. Smartlead is popular with agencies running many clients and mailboxes. We work across all three and will recommend the one that suits your volume, workflow and budget, rather than the one we happen to prefer.

Start with a conversation about who you sell to, what a good customer looks like and what you have tried so far. From there we propose a plan covering infrastructure, lists, messaging and reporting, along with a realistic timeline that allows for warm-up. If you already run Instantly, we usually begin with an audit of your domains, campaigns and data. Either way, we will tell you plainly whether outbound is a good fit for your business and what it will take.