Attachments Files are not display on iPhone

Dear mates,

PDF attachments are not visible on iPhone using Mail app.

Has anyone had this problem ?

How can I correct this problem ?

Email are generate by process: an email activity open on the sender Creatio screen with the file insert as attachment.

We follow this documentation from Ryan Farley:…

The attached files appear well on other email clients...

Thank you !


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Hello Nicolas,


Since other email clients work as expected - it seems that the issue is limited to iOS and not connected to Creatio specifically.


I tried looking for similar problems on the web. Here is an example, perhaps you have a similar issue:


Best Regards,



Patrice from the Nicolas team here.

This issue is not resolved from our side, so i tried to investigate a bit more about it :

I tried sending an email with attachment from Creatio, then read it from an iPhone.

Then sent  an email with same attachment from thunderbird.


The email sent from Creatio do no show the attachment, while the one sent from thunderbird works fine.

Having a look at the email source show some differences around the MIME structure :


the email sent from thunderbird has that structure :

Content-Type: multipart/mixed;

Content-Type: text/plain;

Content-Type: application/pdf;


The email sent from Creatio has that structure : 

Content-Type: multipart/related;

Content-Type: multipart/alternative;

Content-Type: text/plain;

Content-Type: application/pdf;


according to that documentation…

it seems that Creatio should use multipart/mixed as root..


So depending of the email client, the attachment may show or not. 



I'm not 100% sure of this as i'm not used to that topic, but maybe it's worth checking ?


Best regards




Is the issue reproducing only on IOS?

Hello Bogdan,


yes, so far, there is no complains with other  platform..

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