If the size of email attachment is more than 10MB, it's failing to get added to Jira ticket and we see a comment by "Anonymous" with a message as "An error occurred while adding attachments to this issue from the source email. Please check the attachments and re-send the email."
The setting for allowed max attachment size is under Administration -> System
Advanced -> Attachments; Attachment Size.
Per JIRA: "In the Attachment Size field, specify the maximum attachment size. The default (per file) is 10485760 bytes (10 MB). The maximum attachment size (per file) is 2147483647 bytes (2 GB)."
In our Jira instance, our attachment size is set to default 10MB. We requested our admin to increase it to 25 MB to match our e-mail maximum size. Our admin team informed us that as per jira vendor there will be Jira performance issues so they cannot increase it. Hence, It is limited to 10 mb for all the Jira users. Please advise.