Inbox
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Why is my DKIM or SPF authentication partially invalid or failing in 250ok?
It’s not uncommon for DKIM or SPF records to be partially invalid. This can stem from a number o...
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You’ve detected a sending IP in 250ok that isn’t mine. How did it get there?
When we retrieve a message from a mail server, ISPs are not always consistent in how they format ...
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How does 250ok's Inbox rate calculation work?
When viewing the Inbox ISP Overview (clicking Inbox > Campaigns will take you to the Campaign Ove...
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How will I know when the 250ok seedlist is updated?
250ok updates our seedlist on a monthly basis. Users will notice that the interface will display ...
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How do I negate search terms in 250ok's Inbox campaign filters?
When filtering campaigns by subject in Inbox, users can search by partial or full subject lines. ...
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Is there a way to export 250ok Inbox results to a spreadsheet?
Yes! You can export information anywhere you see ‘Download CSV’ or ‘Export’ buttons.
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What is 250ok's Inbox data retention policy?
Inbox currently maintains the following data retention policy: Campaign data – 1 year. ISP and ...
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Can I send a campaign with dynamic subject lines to 250ok's Inbox?
It is possible to send campaigns with dynamic content (subject lines, greetings, etc.) to 250ok I...
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How long does 250ok search for missing email?
The amount of time 250ok looks for Inbox Test results corresponds to the number outlined in Inbo...
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Why does my 250ok Inbox test show 100% missing mail?
When an Inbox test appears in 250ok Inbox with 100% “Missing” results there are a few potential c...
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How do I use the 250ok Inbox Seedlist Optimizer?
250ok INBOX allows you to monitor the performance of campaigns across a variety of regional and ...
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Why is some but not all of my mail consistently missing in 250ok's Inbox?
If you notice that some but not all mail is consistently going missing (only at certain providers...
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How do I send a 250ok Inbox test?
Log in to 250ok and click Inbox > Get Seedlist. On this screen, you’ll see a list of seed addr...
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What is throttling and why is my mail being throttled?
Receiving mailboxes (ISPs) often have a limit on how much mail they can receive during a specific...
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What is 250ok's Inbox Seedlist Weighting and Why is it Important?
Seedlist weighting is the ability to assign specific percentages, or “weighting,” to each individ...
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What providers are included in 250ok's Inbox seedlist coverage?
Inbox provides the most comprehensive international seed coverage to track inbox placement around...
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What is 250ok's seedlist optimizer and why should I use it?
Historically, most deliverability tools have treated receiving ISPs as equals, but that’s clearly...
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What is “missing” mail in 250ok's Inbox?
When 250ok checks mailboxes for your mail, we look in all of the obvious places: inbox, spam fol...
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How often do 250ok's seed addresses change?
For newer seed addresses, your seedlist may change on a monthly basis as 250ok releases new ISPs ...
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The 250ok Seedlist Optimizer isn’t accepting or processing my seedlist
If you have uploaded a seedlist to the 250ok Inbox Seedlist Optimizer follow these instructions f...
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Why can’t I see a campaign I sent to the 250ok Inbox seedlist?
When a campaign doesn’t appear in 250ok (this is different than a campaign showing 100% missing –...
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I'm Receiving a MailChimp Error When Importing the 250ok Seedlist
The user receives the following error when attempting to import their 250ok Seedlist into MailCh...
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I mailed a duplicate campaign into 250ok's Inbox. Why is the duplicate 100% missing?
A 250ok Inbox test could show as 100% missing if it is a duplicate of a previous send, even if th...
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What does DKIM and SPF being at 100% or ‘–‘ mean in 250ok's Inbox?
SPF and DKIM are authentication methods for email. The percentage displayed is the amount of mail...
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Why is 250ok's Inbox taking so long to process emails?
On most Inbox seed tests, you’ll typically see most of the seed results within 2 minutes. Howeve...
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What is the best file format to upload to 250ok's seedlist optimizer?
The best file format for the seedlist optimizer is a plain text or CSV file, with one email addre...