Autotask PSA: What is the max message size for inbound Email-to-Ticket processing?



What is the maximum attachment size for inbound email-to-ticket processing?


  • Autotask PSA


Autotask PSA can accept messages that have up to 10 MB in attachments. Due to encoding, however, messages which are close to 10 MB may be rejected or appear to be larger in the NDR.

The 10 MB limit also applies to the API and not just emails (with attachments). 

When the application rejects an email, you may see the following error message: "reason: 552 6.3.0 Message size exceeds fixed maximum message size."

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