Does automatic email placement testing require an additional subscription?
Yes.
Automatic email placement testing is offered as an add-on subscription on top of your existing PlusVibe plan.
We offer three placement test plans — Starter, Pro, and Scale — each with different features and monthly credit limits.
How are placement test credits used?
Credits are consumed per sender account, per test run.
1 sender account = 1 credit
This applies regardless of:
How many recipient types you select
How many seed emails are sent per recipient
Example:
If you run a placement test on 5 sender accounts, the test will consume 5 credits, even if multiple recipient inboxes are included.
Why does my placement test show 100% Inbox, but my real campaign still hits Spam?
Email placement tests send a small number of test emails to seed inboxes and measure where they land (Inbox, Promotions, Spam).
Real campaigns behave differently because:
Volume is much higher, triggering spam filters more aggressively
Sending patterns matter (burst speed, concurrency, timing)
Recipient behavior varies (opens, replies, deletes, ignores)
Reputation evolves over time, not from just a few emails
A perfect placement test means your setup is capable of inboxing — not that every campaign email will inbox at scale.
Think of placement tests as a health check, not a delivery guarantee.
Why don’t you offer a warm-up feature for placement test seed accounts?
Some tools “warm up” their seed accounts by interacting with your emails (opening, moving from spam to inbox, replying).
This creates biased results.
Once a seed account interacts positively with a sender:
It no longer represents a neutral recipient
Results become artificially inflated
Inbox rates look better than reality
Our approach:
Seed accounts never interact with your emails
No opens, replies, or spam-to-inbox moves
Results stay objective, neutral, and repeatable
This gives you real signal, not false confidence.
What does “Missing Email” mean in a placement test?
A “Missing” email means the test email was not found in any folder (Inbox, Promotions, Spam).
Common reasons include:
Blocked or filtered by your sending server
Rejected or silently dropped by the recipient server
Filtered before mailbox delivery
Temporary routing or reputation-based suppression
If a test email is not detected within 1 hour after sending, it is marked as Missing.
Missing emails are often a strong deliverability warning sign.
Why is there sometimes a delay in detecting placement test results?
Delays are usually caused by sending infrastructure, not the test itself.
Common reasons:
SMTP throttling (email accepted but queued)
Provider-side sending queues
Dynamically applied rate limits
Temporary reputation or traffic shaping
Should I run placement tests on every sender account?
No — and doing so can actually hurt deliverability.
Why:
Content fatigue
Providers dislike seeing identical content repeatedly across many senders.Wasted sending capacity
Placement tests consume sending power that could be used for real campaigns.Unnecessary noise
Sender reputation is influenced by patterns, not isolated tests.
Best practice:
Test representative sender accounts
Rotate content between tests
Test when something changes (domain, copy, infrastructure, volume) — not constantly
When will features like blacklist checks and spam filter checks be available?
We’re actively working on these features and plan to roll them out shortly.
Blacklist checks and spam filter analysis will be part of our ongoing deliverability feature expansion, helping you diagnose issues before they impact campaigns.
Updates will be announced as soon as these features go live.
What kind of domains are used for seed accounts?
We use realistic, natural-looking domains for our seed accounts — domains that closely resemble normal end-user inboxes.
Some tools rely on obvious testing domains (e.g. placement-test.com, sl-placement.com). These can be easily recognized by spam filters and may produce distorted results.
By using realistic domains:
Spam filters treat test emails more like real traffic
Results better reflect real-world delivery behavior
Inbox, Promotions, and Spam placement is more reliable
This ensures your placement test results are as close as possible to real campaign conditions.