Inbox

It’s not uncommon for DKIM or SPF records to be partially invalid. This can stem from a number of issues: Occasionally, DNS glitches (receiver-side or sender-side) can lead to temporary authentication errors at specific ISPs. Invalid DKIM key or...

When we retrieve a message from a mail server, ISPs are not always consistent in how they format the sending IP addresses. Additionally, message header patterns occasionally change, and we have to modify the way we extract the information. If we’v...

When viewing the Inbox ISP Overview (clicking Inbox > Campaigns will take you to the Campaign Overview screen where you can and select the ISP Overview tab) you will notice ISPs listed globally and by region, as well as by hosting and filtering co...

250ok updates our seedlist on a monthly basis. Users will notice that the interface will display the message “_x_ new seeds are available” each time the seedlist has been updated. We also announce seedlist changes in our newsletter, which is avail...

When filtering campaigns by subject in Inbox, users can search by partial or full subject lines. Because it can be taxing to keep a running tab of all of your sends we also provide users with the ability to negate terms as well. For example, say y...

Yes! You can export information anywhere you see ‘Download CSV’ or ‘Export’ buttons.

Inbox currently maintains the following data retention policy: Campaign data – 1 year. ISP and email detail – 90 days. Email headers – 30 days.

It is possible to send campaigns with dynamic content (subject lines, greetings, etc.) to 250ok Inbox, but you will need to implement an x-header or hidden body tag to help us identify your messages as belonging to the same campaign. By default we...

The amount of time 250ok looks for Inbox Test results corresponds to the number outlined in Inbox > Settings > Campaign Duration. This can be adjusted at any time.

When an Inbox test appears in 250ok Inbox with 100% “Missing” results there are a few potential causes: Confirm you are sending to the complete 250ok Inbox seedlist. If the affected test is a duplicate of a previous campaign see our article on im...

250ok INBOX allows you to monitor the performance of campaigns across a variety of regional and global email service providers, as well as hosting and filter companies. A feature of 250ok Inbox is the Seedlist Optimizer tool. The Seedlist Optimiz...

If you notice that some but not all mail is consistently going missing (only at certain providers, certain addresses showing alternating missing and inboxing/spam results, etc.) use the following steps: Ensure you are sending to the complete seed...

Log in to 250ok and click Inbox > Get Seedlist. On this screen, you’ll see a list of seed addresses specific to your account. In order for us to provide accurate results, you should send to all of these addresses each time you want us to track ...

Receiving mailboxes (ISPs) often have a limit on how much mail they can receive during a specific timeframe. If you’re sending them too much mail, or sending it too fast, they can choose to defer mail in a process known as throttling.  Reasons for...

Seedlist weighting is the ability to assign specific percentages, or “weighting,” to each individual ISP in Inbox to make your seed results more accurately reflective of where you send mail. If you’re not sure where you send mail, you can leverage...

Inbox provides the most comprehensive international seed coverage to track inbox placement around the world and deliver real-time feedback. While we don’t disclose the list publicly, feel free to contact us for a comprehensive list.

Historically, most deliverability tools have treated receiving ISPs as equals, but that’s clearly not the case. Before the seedlist optimizer, weighing your priorities were typically a best-guess effort. By uploading a sample of your mailing list ...

When 250ok checks mailboxes for your mail, we look in all of the obvious places: inbox, spam folders, tabs, trash, etc. Missing mail is made up of messages that we definitively know did not reach a mail server. Missing results within our applicat...

For newer seed addresses, your seedlist may change on a monthly basis as 250ok releases new ISPs into its coverage. For existing seed addresses, we proactively rotate new and old addresses throughout the month as we identify issues through real-ti...

If you have uploaded a seedlist to the 250ok Inbox Seedlist Optimizer follow these instructions for troubleshooting. NOTE: 250ok discards your uploaded file once it is processed. Consolidated results are saved until you choose to delete them. You ...

When a campaign doesn’t appear in 250ok (this is different than a campaign showing 100% missing – something we go in to more detail on here: Why does my Inbox test show 100% missing mail?) you can typically narrow the problem down to one of two ca...

The user receives the following error when attempting to import their 250ok Seedlist into MailChimp: “In MailChimp this seed address is either invalid or role-based and could not be imported.” To resolve this issue simply complete the following s...

A 250ok Inbox test could show as 100% missing if it is a duplicate of a previous send, even if the send if from a different address. To remedy this issue, 250ok recommends implementing an x-header or HTML body tag to help identify your mail. Click...

SPF and DKIM are authentication methods for email. The percentage displayed is the amount of mail which passed authentication at the ISP. ‘–‘ means we couldn’t identify the DKIM / SPF value or the ISP doesn’t use these authentication methods.

On most Inbox seed tests, you’ll typically see most of the seed results within 2 minutes. However, some ISPs have a delay for a number of reasons: Mail could be throttled. Receiving mailbox could be having network or connectivity issues. Mail wa...

The best file format for the seedlist optimizer is a plain text or CSV file, with no header row, one email address or domain per line, and no other data included. The seedlist optimizer will not recognize Word docs, Excel files, etc. It’s worth no...