Envora · Bulk email from your iPhone
Envora: dispatch bulk emails without the markup
Cost-efficient bulk email for small businesses, freelancers and marketers, with no per-subscriber traps and no inflated tiers.
App Store · Free to download · iPhone
Which situation are you in?
- Never set up DNS records: start with SPF/DKIM/DMARC.
- Records are fine but mail still lands in spam: reputation.
- New domain: warm up.
How we checked
We kept the original guide’s deliverability checklist and linked Google’s sender guidelines. Thresholds quoted are from the original guide and marked for sourcing.
Authentication
- SPF: Which servers may send for your domain
- DKIM: Signature proving the message is from you
- DMARC: What receivers do when checks fail; start at p=none
Reputation
- Complaints: Keep “report spam” rare
- Bounces: Remove invalid addresses
- Engagement: Opens and replies help
Warm-up
- Start: Most engaged contacts first
- Ramp: Increase volume gradually
- Avoid: Zero to thousands in a day
Comparison at a glance
| Fix | Effort | Impact |
|---|---|---|
| SPF | Minutes | High |
| DKIM | Minutes | High |
| DMARC | Minutes | High |
| Clean bounces | Per send | High |
| Warm-up | Weeks | High for new domains |
| Rewrite subject lines | Minutes | Lower |
Effort/impact are the guide’s judgement, not measured.
Spam filters judge the sender, not the sentence
Most advice about avoiding spam folders focuses on wording — avoid "free", do not use too many exclamation marks. That advice is twenty years out of date. Modern filters at Gmail, Outlook, and Apple Mail weigh who is sending and how recipients react far more heavily than what the message says.
A trusted sender can write "FREE OFFER" in the subject line and land in the inbox. An unauthenticated sender with a cold list will land in spam writing perfect prose. Fix the sender first.
The three DNS records that decide everything
These are not optional extras. Since 2024, both Google and Yahoo require authentication for anyone sending in volume, and unauthenticated bulk mail is increasingly rejected outright rather than filtered.
- SPF lists which servers are allowed to send for your domain. Published as a TXT record. If you send through Google Workspace, that means including
_spf.google.com. Without it, receivers cannot tell your mail from a forgery. - DKIM adds a cryptographic signature to every message, so the receiver can verify it was not altered in transit and genuinely came from your domain. Your mail provider gives you the key to publish.
- DMARC tells receivers what to do when SPF or DKIM fails, and asks them to report failures back to you. Start at
p=noneto observe, then tighten toquarantineonce your reports are clean.
You can check all three in a minute with any public DNS lookup tool. If any are missing, that is your single highest-impact fix — bigger than anything you could do to the email itself.
Reputation is earned per domain and per IP
Mailbox providers build a running score for your sending domain based on how people treat your mail. The inputs that matter most:
- Complaint rate. People clicking "report spam". Keep it below roughly 0.1% — one complaint per thousand. Above 0.3% and you are in real trouble.
- Hard bounces. Mail to addresses that do not exist signals you did not get permission or never clean your list.
- Engagement. Opens, replies, and time-in-inbox raise your score. A list where nobody opens anything slowly poisons everything you send.
- Spam-trap hits. Addresses that exist purely to catch senders using purchased lists. One hit can be costly.
Warming up, and why volume spikes hurt
A domain that has never sent bulk mail has no reputation at all, and mailbox providers treat unknown senders cautiously. Going from zero to ten thousand emails in one day looks exactly like a compromised account.
Ramp instead. Start with your most engaged contacts — people who recently bought or replied — in batches of tens, then hundreds. Early positive engagement builds the reputation that later, larger sends depend on. This takes a couple of weeks and it is the difference between arriving and disappearing.
List hygiene beats list size
The instinct is to mail everyone. The arithmetic argues otherwise: a list of 500 engaged people outperforms 5,000 indifferent ones, because the indifferent 4,500 actively damage your ability to reach the 500.
Practical rules: remove hard bounces immediately. Stop mailing anyone who has not opened anything in six months. Never buy a list — purchased addresses are the fastest route to spam traps. Make unsubscribing one click, because someone who cannot find the unsubscribe link clicks "report spam" instead, and that costs you far more.
Things that genuinely do affect placement
Send from a real, monitored address rather than noreply@ — replies are a strong positive signal. Keep a sensible text-to-link ratio; a message that is one image and one tracking link looks like a template farm. Use a consistent from-name and sending schedule, since erratic patterns read as compromise. And avoid link shorteners, which are heavily abused and often flagged on sight.
Where Envora fits
Envora is our bulk email dispatch app for iPhone, built for small businesses and freelancers who need to send real volume without per-subscriber pricing. It handles the dispatch side; authentication lives in your DNS, and the checklist above is what you should verify before your first campaign regardless of which tool you use.
If you want X, take Y
- If you want the single biggest fix, take SPF, DKIM and DMARC.
- If you want to check your reputation, take Google Postmaster Tools.
- If you send from iPhone, Envora lets you set a delay between emails.
Sources are linked inline. Google can change its limits, so check the linked pages before a large send.