# mautic.ERROR: Invalid clickthrough value:

**URL:** <https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833>\
**Category:** Mautic 3 - Install/Upgrade Support\
**Created:** [August 27, 2020, 1:07pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833 "2020-08-27T13:07:28Z")\
**Posts on this page:** 11\
**Page:** 1

<div class="post-metadata">

**Author:** ![malik](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/malik/32/433_2.png) [@malik](https://forum.mautic.org/u/malik)\
**Post date:** [August 27, 2020, 1:07pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/1 "2020-08-27T13:07:28Z")

</div>

**Your software**  
_My PHP version is_ : php 7.3.20  
_My MySQL version is_ 5.7.30-1debian10 (docker image: mysql:5.7)  
_Mautic_: v3.0.2

**Errors**  
After sending a campaign, the email numbers (open, click, etc) are now showing up in the campaign

I can still see the numbers at the email template level but it’s not appearing in the campaign section.

_ **… Invalid clickthrough value …** _

**These errors are showing in the Mautic log** :

{“exception”:"[object] (Mautic\CoreBundle\Exception\InvalidDecodedStringException(code: 0): The string b:8:{f:9:“fbhedf”;b:5:{v:3;f:47:“dbzcbvta.fifag”;v:4;v:48;}f:8:“fzbvy”;v:47;f:7:“fgbg”;f:55:“8a700b4254fb6275630157”;f:7:“yfbe”;f:6:“728”;f:0:“dubaafy”;b:4:{f:8:“fzbvy”;v:47;}} is not a serialized array at /var/www/html/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:46)"}

Any idea?

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<div class="post-metadata">

**Author:** ![gary.harrison](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/gary.harrison/32/2864_2.png) [@gary.harrison](https://forum.mautic.org/u/gary.harrison)\
**Post date:** [September 22, 2020, 3:36am UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/2 "2020-09-22T03:36:03Z")

</div>

I’m experiencing the same issue here…

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<div class="post-metadata">

**Author:** ![malik](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/malik/32/433_2.png) [@malik](https://forum.mautic.org/u/malik)\
**Post date:** [October 9, 2020, 7:31am UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/3 "2020-10-09T07:31:20Z")

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Anyone who can help here?

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<div class="post-metadata">

**Author:** ![adirbnology](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/adirbnology/32/494_2.png) [@adirbnology](https://forum.mautic.org/u/adirbnology)\
**Post date:** [November 29, 2020, 9:33am UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/4 "2020-11-29T09:33:16Z")

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same issue here as well . no idea how to trace it

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<div class="post-metadata">

**Author:** ![plato39](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/plato39/32/2343_2.png) [@plato39](https://forum.mautic.org/u/plato39)\
**Post date:** [April 28, 2021, 12:09pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/5 "2021-04-28T12:09:22Z")

</div>

I have the same issue. Even with v3.3.2. (I’m not using docker image).

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<div class="post-metadata">

**Author:** ![imihandstand](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/imihandstand/32/1499_2.png) [@imihandstand](https://forum.mautic.org/u/imihandstand)\
**Post date:** [May 8, 2021, 4:46pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/6 "2021-05-08T16:46:13Z")

</div>

I have the same error. Mautic 3.3.2

`[2021-05-08 12:55:28] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo0NzoiZGJ6Y2J2dGEuZmlmYWciO3Y6NDt2OjU3MTt9Zjo4OiJmemJ2eSI7djo0MzM7Zjo3OiJmZ2JnIjtmOjU1OiI5MzI5MWI1ZTNhNWEwNjczNDI0MzkyIjtmOjc6InlmYmUiO2Y6ODoiNzU4MjYiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjQzMzt9fQ== {"exception":"[object] (Mautic\\CoreBundle\\Exception\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\"fbhedf\";b:5:{v:3;f:47:\"dbzcbvta.fifag\";v:4;v:571;}f:8:\"fzbvy\";v:433;f:7:\"fgbg\";f:55:\"93291b5e3a5a0673424392\";f:7:\"yfbe\";f:8:\"75826\";f:0:\"dubaafy\";b:4:{f:8:\"fzbvy\";v:433;}} is not a serialized array at /mydomain/mautic/mautic/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:46)"} []`

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<div class="post-metadata">

**Author:** ![plato39](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/plato39/32/2343_2.png) [@plato39](https://forum.mautic.org/u/plato39)\
**Post date:** [August 2, 2021, 11:28am UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/7 "2021-08-02T11:28:04Z")

</div>

This is still happening. Mautic 3.3.3.

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<div class="post-metadata">

**Author:** ![Yosu\_Cadilla](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/yosu_cadilla/32/6206_2.png) [@Yosu\_Cadilla](https://forum.mautic.org/u/Yosu_Cadilla)\
**Post date:** [February 21, 2023, 7:14am UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/8 "2023-02-21T07:14:21Z")

</div>

I can confirm this is still an issue with Mautic 4.4.x

There’s an open issue on Github, please guys go there and report your case if you have a couple minutes to spare…

> <https://github.com/mautic/mautic/issues/6775>
>
> \[//\]: # ( Invisible comment: 
> IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII…I
> Before you create the issue:
> IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
> Search for similar report among other reported issues.
> Learn how to troubleshoot at https://www.mautic.org/docs/en/tips/troubleshooting.html
> Use drag&drop to attach images or other files )
> 
> \## Bug Description
> After sending emails that contains tracked links I often see such error messages in the log.
> 
> Not all clicks end up in errors like this. So far I could not figure out what leads to this kind of clickthrough error.
> Mautic is behind proxy, runs in docker container
> Locale is set to hungarian UTF-8
> 
> 
> | Q | A
> | --- | ---
> | Mautic version | 2.14.1
> | PHP version | 7.0.28
> | Browser | Firefox 62.0.3
> 
> \### Steps to reproduce
> 1. Create segment mail with tracked link
> 2. Send mail to multiple recipients
> 3. Wait for incoming clicks
>  
> \### Log errors
> \`\[2018-10-15 14:49:21\] mautic.CRITICAL: Uncaught PHP Exception InvalidArgumentException: "The string ,f.&..U"0U{,f....{f.
> ..{.f.lzfj{z.f0.n...lzfj{f.4W.&..e.u/6t..ug.dd..dg.t.dtW.&..W92,..vz..ddd.dcW.&. zW0.,.a0..dzdg;f...{.f.h=
> = is not a serialized array." at /var/www/html/app/bundles/CoreBundle/Helper/ClickthroughHelper.php line 42 \[\]\`
> 
> \[//\]: # ( Invisible comment:
> Please check for related errors in the latest log file in \[mautic root\]/app/log/ and/or the web server's logs and post them here. Be sure to remove sensitive information if applicable. )

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<div class="post-metadata">

**Author:** ![Yosu\_Cadilla](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/yosu_cadilla/32/6206_2.png) [@Yosu\_Cadilla](https://forum.mautic.org/u/Yosu_Cadilla)\
**Post date:** [March 17, 2023, 1:29pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/9 "2023-03-17T13:29:50Z")

</div>

> [@Yosu\_Cadilla](#):
>
> couple

Probably related:

> <https://github.com/mautic/mautic/issues/6775>
>
> \## Bug Description
> After sending emails that contains tracked links I often see… such error messages in the log.
> 
> Not all clicks end up in errors like this. So far I could not figure out what leads to this kind of clickthrough error.
> Mautic is behind proxy, runs in docker container
> Locale is set to hungarian UTF-8
> 
> 
> | Q | A
> | --- | ---
> | Mautic version | 2.14.1 (still an issue on 4.4.x)
> | PHP version | 7.0.28
> | Browser | Firefox 62.0.3
> 
> \### Steps to reproduce
> 1. Create segment mail with tracked link
> 2. Send mail to multiple recipients
> 3. Wait for incoming clicks
>  
> \### Log errors
> \`\[2018-10-15 14:49:21\] mautic.CRITICAL: Uncaught PHP Exception InvalidArgumentException: "The string ,f.&..U"0U{,f....{f.
> ..{.f.lzfj{z.f0.n...lzfj{f.4W.&..e.u/6t..ug.dd..dg.t.dtW.&..W92,..vz..ddd.dcW.&. zW0.,.a0..dzdg;f...{.f.h=
> = is not a serialized array." at /var/www/html/app/bundles/CoreBundle/Helper/ClickthroughHelper.php line 42 \[\]\`
> 
> \[//\]: # ( Invisible comment:
> Please check for related errors in the latest log file in \[mautic root\]/app/log/ and/or the web server's logs and post them here. Be sure to remove sensitive information if applicable. )
> 
> 
> \<bountysource-plugin\>
> 
> \---
> Want to back this issue? \*\*\[Post a bounty on it!\](https://app.bountysource.com/issues/65155356-clickthrough-error-string-is-not-a-seriazelized-array?utm\_campaign=plugin&utm\_content=tracker%2F5355074&utm\_medium=issues&utm\_source=github)\*\* We accept bounties via \[Bountysource\](https://app.bountysource.com/?utm\_campaign=plugin&utm\_content=tracker%2F5355074&utm\_medium=issues&utm\_source=github).
> \</bountysource-plugin\>

> <https://github.com/mautic/mautic/issues/9400>
>
> \[//\]: # ( Invisible comment: 
> IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII…I
> Before you create the issue:
> IIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIIII
> Search for similar report among other reported issues.
> Learn how to troubleshoot at https://www.mautic.org/docs/en/tips/troubleshooting.html
> Use drag&drop to attach images or other files )
> 
> \## Bug Description
> This bug occurs in campaign events. DOESN'T HAPPEN IN COMMON EVENTS...
> 
> When creating a campaign that sends an email to the contact, and then tracks the action "Clicked on email", after the contact clicks the link an error in the log appears. Furthermore, Mautic stops recording any more "Contact / lead" tracking.
> 
> The same email sent outside of a campaign does not generate the error.
> 
> Also, campaign that contains the email sending rule: "in the relative time period". 1 day between the hours of 08:00 am to 03:00 pm, still sends e-mails after the scheduled time.
> 
> 
> | Q | A
> | --- | ---
> | Mautic version | 3.1.2
> | PHP version | 7.3 PHP-FPM
> | SMTP | SendBlue
> 
> 
> \### Steps to reproduce
> 1. Create an email with a LINK.
> 2. Create a campaign containing: Has valid email address, Visits a page, Add Do Not Contact, Modify contact's segments, Update contact, Change campaigns.
> 3. Configure email delivery: "in the relative time period". 1 day between the hours of 08:00 am to 03:00 pm
> 
> \### Tracking error
> The tracking problem, I see that it is related to devices that have multiple users.
> 
> 1. Create Two Leads.
> 2. Send email to the 2.
> 3. Click the link in the email on one of the Leads and check its history, it is working perfectly.
> 4. Click the link in the email with the other Lead, now look at the history of the two leads. Traking was not triggered for either lead.
>  
> \### Log errors
> 
> 
> \[//\]: # ( Invisible comment:
> Please check for related errors in the latest log file in \[mautic root\]/app/log/ and/or the web server's logs and post them here. Be sure to remove sensitive information if applicable. )
> mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo0NzoiZGJ6Y2J2dGEuZmlmYWciO3Y6NDt2OjQxMDg7fWY6ODoiZnpidnkiO3Y6NDk4O2Y6NzoiZmdiZyI7Zjo1NToiOGFiZGFkZTc1MTg4NTIxNjEzMjgyNiI7Zjo3OiJ5ZmJlIjtmOjk6IjY3ODc0MiI7ZjowOiJkdWJhYWZ5IjtiOjQ6e2Y6ODoiZnpidnkiO3Y6NDk4O319 {"exception":"\[object\] (Mautic\\\\CoreBundle\\\\Exception\\\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\\"fbhedf\\";b:5:{v:3;f:47:\\"dbzcbvta.fifag\\";v:4;v:4253;}f:8:\\"fzbvy\\";v:499;f:7:\\"fgbg\\";f:55:\\"8abe41efff8d1525464563\\";f:7:\\"yfbe\\";f:9:\\"417552\\";f:0:\\"dubaafy\\";b:4:{f:8:\\"fzbvy\\";v:499;}} is not a serialized array at /public\_html/mkt.comm/app/bundles/CoreBundle/Helper/ClickthroughHelper.php:53)"} \[\]
> 
> 
> !\[Editar-Campanha-Mautic (1)\](https://user-images.githubusercontent.com/72410310/98998660-48272d00-2515-11eb-82b1-9f19e4489923.png)
> 
> 
> !\[image\](https://user-images.githubusercontent.com/72410310/98998594-2cbc2200-2515-11eb-9e68-21df98332a6d.png)
> 
> SendBlue
> 
> It started before the scheduled time
> !\[image\](https://user-images.githubusercontent.com/72410310/98999204-25494880-2516-11eb-8bd4-db120748c109.png)
> 
> It didn't stop when it should.
> !\[image\](https://user-images.githubusercontent.com/72410310/98999093-efa45f80-2515-11eb-9d67-92c950ae836d.png)
> 
> Using Amazon SES SMTP, Mautic respected the configured shipping times. However, the test was performed in another installation, both on the same server with the same settings.
> 
> 
> 
> \<bountysource-plugin\>
> 
> \---
> Want to back this issue? \*\*\[Post a bounty on it!\](https://app.bountysource.com/issues/94211522-campaign-error-with-sending-scheduled-email-and-with-tracking?utm\_campaign=plugin&utm\_content=tracker%2F5355074&utm\_medium=issues&utm\_source=github)\*\* We accept bounties via \[Bountysource\](https://app.bountysource.com/?utm\_campaign=plugin&utm\_content=tracker%2F5355074&utm\_medium=issues&utm\_source=github).
> \</bountysource-plugin\>

> <https://github.com/mautic/mautic/pull/10444>
>
> | Q | A
> | --------------------------------…------ | ---
> | Branch? | "features" for all features, enhancements and bug fixes (until 3.3.0 is released) 
> | Bug fix? | yes/no
> | New feature? | yes/no
> | Deprecations? | yes/no
> | BC breaks? | yes/no
> | Automated tests included? | yes/no
> | Related user documentation PR URL | mautic/mautic-documentation#... 
> | Related developer documentation PR URL | mautic/developer-documentation#... 
> | Issue(s) addressed | Fixes #9400
> 
> \<!--
> Additionally (see https://contribute.mautic.org/contributing-to-mautic/developer/code/pull-requests#step-5-work-on-your-pull-request):
> - Always add tests and ensure they pass.
> - Bug fixes must be submitted against the lowest maintained branch where they apply
> (lowest branches are regularly merged to upper ones so they get the fixes too.)
> - Features and deprecations must be submitted against the "features" branch.
> \--\>
> 
> \<!--
> Please write a short README for your feature/bugfix. This will help people understand your PR and what it aims to do.
> \--\>
> \#### Description:
> This PR fix issue millions logs like:
> 
> \`\[2021-09-02 10:28:41\] mautic.ERROR: Invalid clickthrough value: Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NDAyO31mOjg6ImZ6YnZ5Ijt2OjQwMjtmOjc6ImZnYmciO2Y6NTU6Ijk0NjNiNWNjMWRmNzk5MjcwNjI0NDUiO2Y6NzoieWZiZSI7ZjowOiI0OTY1Nzg1IjtmOjA6ImR1YmFhZnkiO2I6NDp7Zjo4OiJmemJ2eSI7djo0MDI7fX0= {"exception":"\[object\] (Mautic\\\\CoreBundle\\\\Exception\\\\InvalidDecodedStringException(code: 0): The string b:8:{f:9:\\"fbhedf\\";b:5:{v:3;f:8:\\"fzbvy\\";v:4;v:402;}f:8:\\"fzbvy\\";v:402;f:7:\\"fgbg\\";f:55:\\"9463b5cc1df79927062445\\";f:7:\\"yfbe\\";f:0:\\"4965785\\";f:0:\\"dubaafy\\";b:4:{f:8:\\"fzbvy\\";v:402;}} is not a serialized array at..\`
> 
> I collect the requests, and it looks like this kind of requests are from bots (Microsoft....)
> Then we should skip it.
> 
> \<!--
> If you are fixing a bug and if there is no linked issue already, please provide steps to reproduce the issue here.
> \--\>
> 
> \#### Steps to test this PR:
> 1. Load up \[this PR\](https://mautibox.com)
> 2. Go to your page with tracking code
> 3. Add to url \`?ct=Yjo4OntmOjk6ImZiaGVkZiI7Yjo1Ont2OjM7Zjo4OiJmemJ2eSI7djo0O3Y6NTM4O31mOjg6ImZ6YnZ5Ijt2OjUzODtmOjc6ImZnYmciO2Y6NTU6Ijk0NzY4Y2I4YmZhMGY4Nzc2NTMzODEiO2Y6NzoieWZiZSI7Zjo5OiI4MjM5OTgiO2Y6MDoiZHViYWFmeSI7Yjo0OntmOjg6ImZ6YnZ5Ijt2OjUzODt9fQ\`
> 4. Check your logs and you should see error : \`mautic.ERROR: Invalid clickthrough value: \`
> 5. After PR page you should see not tracked page in the browser console - we asume it's bot
> 
> !\[image\](https://user-images.githubusercontent.com/462477/133642035-0df7fb45-59d5-443e-9b21-abb2eb29e04c.png)
> 
> 
> \<!--
> If you have any deprecations, list them here along with the new alternative.
> If you have any backwards compatibility breaks, list them here.
> \--\>

> [@mautic.ERROR: Invalid clickthrough value](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/8):
>
> I can confirm this is still an issue with Mautic 4.4.x There’s an open issue on Github, please guys go there and report your case if you have a couple minutes to spare…

---

<div class="post-metadata">

**Author:** ![Yosu\_Cadilla](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/yosu_cadilla/32/6206_2.png) [@Yosu\_Cadilla](https://forum.mautic.org/u/Yosu_Cadilla)\
**Post date:** [May 4, 2023, 9:42pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/10 "2023-05-04T21:42:03Z")

</div>

Another instance, this time it’s a 3.3.5, started doing it this week…  
I suspect incomplete data sent to the Mautic API could be causing this.

---

<div class="post-metadata">

**Author:** ![plato39](https://sea2.discourse-cdn.com/flex020/user_avatar/forum.mautic.org/plato39/32/2343_2.png) [@plato39](https://forum.mautic.org/u/plato39)\
**Post date:** [May 6, 2025, 6:20pm UTC](https://forum.mautic.org/t/mautic-error-invalid-clickthrough-value/15833/11 "2025-05-06T18:20:28Z")

</div>

I believe I have found the cause of these errors. Microsoft Outlook maintains its own email domain reputation system called: [Outlook.com](http://Outlook.com) Smart Network Data Service. It is completely separate from all the other spam lists, so many people do not realise that their email domains deliverability is affected by this. I discovered my mail domain IP was listed as **Not qualified for mitigation** , which translates as “treat as junk”. I was pretty surprised to find this out and quickly got my IP off the list (all IPs have a history of course).

A side effect of getting my IP clean in the eyes of MS Outlook has meant I no longer see the mautic Invalid clickthrough value error. So it would appear that it is the Outlook Smart Network Data Service that is the root cause of this error.

You can request that your domain IP is removed here: [Smart Network Data Services](https://sendersupport.olc.protection.outlook.com/snds/)
