Warming up
Transactional email API
Practical, vendor-neutral writing on email deliverability, warmup, sender reputation, and cold outreach. No hot takes, no SEO filler, just the playbooks we actually use.
Latest · Comparison
Seven of the nine best-known outreach tools run email and LinkedIn in one subscription; Smartlead and Instantly hand LinkedIn to a second paid tool. Here is what one sender with one LinkedIn account actually costs on each, from $27 to $109 a month.
9 min read
Comparison
Both de-anonymize your website traffic, but they sell it very differently: Warmly is self-serve with a free tier and contact-level matching, Lead Forensics is an annual, quote-only enterprise contract. Here is the honest split.
9 min read
Deliverability
Your emails are going to junk for one of six reasons, and usually more than one at once. Here is how to diagnose which, fix it in the right order, and stop it happening again.
10 min read
Comparison
Instantly is built for high-volume cold email at a low entry price; Reply.io is a multichannel sales engagement platform priced per user. Here is the honest split, with real prices, three cost scenarios and the warmup question both leave to you.
9 min read
Comparison
The honest answer to Instantly vs Clay: they do different jobs. Clay builds and enriches your list; Instantly sends the cold email. Here is which to buy first if you can only afford one.
10 min read
Comparison
Dripify is the focused LinkedIn automation specialist; Meet Alfred adds email and X for multichannel. Here is the feature-by-feature split, who each is genuinely best for, and the account-warmup gap both share.
11 min read
Comparison
Lemlist is email-first multichannel; Waalaxy is LinkedIn-first prospecting with a real free tier. Here is the feature-by-feature breakdown of which one fits your outreach, and the deliverability gap neither closes.
11 min read
Comparison
Expandi is the agency-favorite with deep personalization; Meet Alfred is the affordable multichannel option at half the seat price. Here is the feature-by-feature split, and what neither handles.
10 min read
Comparison
Instantly is built for cold email at volume with unlimited inboxes and warmup; lemlist is built for personalized sequences, and adds LinkedIn on its Multichannel plan. Here is the honest split, with real prices and the team sizes where each one wins.
9 min read
Cold email
Most reply volume comes from follow-ups, not first touches, but only if the spacing, channel mix, and stop conditions are right. Here's the cadence, with the numbers.
8 min read
Cold email
Instantly.ai raised its prices. Its per-mailbox warmup model stops making sense the moment you scale past a handful of inboxes. Here are seven alternatives worth switching to in 2026.
10 min read
LinkedIn outreach
LinkedIn watches new accounts closely. Here is a week-by-week plan to warm one up (profile completeness, activity signals, and connection pacing) so it survives outreach instead of getting flagged in the first week.
9 min read
LinkedIn outreach
Your reply rate rarely collapses from one bad message. It bleeds out through a stack of small mistakes: an over-pitched connection note, a thin profile, volume your account never earned. Here is what to fix first.
9 min read
Your SSI is a 0-100 number LinkedIn calculates from four behaviors, each worth 25 points. It is a proxy, not a ranking lever. Here is what moves it and what to ignore.
8 min read
LinkedIn outreach
Send-time tweaking earns you single-digit percentage gains at best. Targeting, relevance, and a warm sender account are where the real reply-rate differences live. Here is how to think about both.
8 min read
LinkedIn restrictions are not random. They follow patterns you can read, recover from, and design around. Here is the playbook for getting your account back and keeping it.
9 min read
LinkedIn outreach
Most LinkedIn dashboards reward the wrong behavior. Here are the metrics that actually predict booked meetings, the ones that just make you feel busy, and how to instrument tracking without drowning in a spreadsheet.
9 min read
Linkedin outreach
Most LinkedIn outreach fails before it's sent, because the sender never read the profile. Here's the research process that finds a real reason to message someone, and the signals worth ignoring.
9 min read
LinkedIn outreach
Most LinkedIn outreach is cold because the sender and the recipient have nothing in common except a sales pitch. Shared groups and event attendance change that. This is how to find, join, and work them without being the person everyone mutes.
9 min read
Deliverability
If Google Postmaster Tools or your warmup dashboard is showing a low domain reputation, something in your sending history has flagged your domain as a risk. Here is how to find the cause and fix it.
9 min read
Cold email
No replies does not always mean bad copy. It can mean your emails are going to spam, reaching the wrong people, or arriving at the wrong time. Here is how to tell the difference and fix the right thing.
11 min read
Inbox placement
Your campaign tool says 'delivered'. That does not mean anyone saw it. Inbox placement is the metric that tells you whether your email landed somewhere the recipient will actually look.
8 min read
Cold email
A bounce rate above 2% will hurt your deliverability faster than almost any other mistake. Here is what counts as a bounce, why it happens in cold email, and the fix.
9 min read
Infrastructure
Most cold email campaigns fail before a single word is read. The domain is unaged, the DNS is misconfigured, the mailbox was never warmed. This guide covers the full setup, layer by layer.
12 min read
Blacklist
Getting listed on an email blacklist can quietly kill your deliverability before you even notice. Here is what blacklists are, why they exist, and exactly what to do if you end up on one.
8 min read
Domain Health
Most deliverability problems are visible before they show up in your reply rate. Here is how to audit your sending domain in under 30 minutes and know exactly what to fix.
8 min read
Cold email
Cold email lives or dies in the setup phase. Get the infrastructure right before you write a single line of copy and everything else is easier. Get it wrong and no tool will save you.
14 min read
Sender Reputation
Sender reputation is the invisible score that decides whether your emails land in the inbox or the spam folder. Here is what it actually measures, and how to build it properly.
9 min read
Outlook
Outlook's junk folder catches more cold email than most senders realise. The fix is not always obvious, because Outlook weights signals very differently from Gmail. Here is the diagnostic, step by step.
8 min read
Metrics
If your reply rate is steady, deliverability must be fine, right? Not quite. Reply rate measures the people who saw your message. It tells you nothing about the people whose copies went straight to spam.
9 min read
Comparison
All three warm your mailboxes and send your campaigns. They differ on what they meter, how they handle LinkedIn, and how deep the deliverability tooling goes. Here is the honest comparison, including where we (Warmerly) lose.
10 min read
DNS
Three records, three jobs, one chain. Get the chain right and most deliverability problems vanish before you ever touch warmup or copy.
9 min read
Gmail
Your campaign lands in Gmail's inbox but Outlook's junk, or the other way around. The two providers use very different signals. Here is how to optimise for both.
10 min read
Gmail
Gmail's spam filter is the toughest in the business. If your mail is landing there, the fix is rarely a few changed words; it is usually two or three problems at once. Here is how to find them and the order to fix them in.
9 min read
DNS
Three DNS records stand between cold email and the inbox. Here are the exact records to publish, what Gmail and Yahoo require since 2024, the alignment rule most guides skip, and how to check it all in five minutes.
9 min read
Everything here assumes a mailbox providers already trust. Building that is the slow, boring part, and it is the part Warmerly does for you. Free plan, no card required.