Anyone got an idea why the usage is so high?

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image.png2529×1673 1.15 MB

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I’m on phone so the screenshot is small, which resource is over-used?

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One moment. I don’t think this is an issue with Kumo

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Looks like one of the emails sent by our client was malformed and our connector kept hammering KumoMTA with that email again and again. Which obviously resulted in very high CPU usage.

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Let me patch that up

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My bad guys

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Jan 13 23:37:00 mta3 mta-connector[11659]: 1 | RCPT TO:<�learmonte@XXXXXXXXXXXXXXXXX>
Jan 13 23:37:00 mta3 mta-connector[11659]: | ^—
Jan 13 23:37:00 mta3 mta-connector[11659]: |
Jan 13 23:37:00 mta3 mta-connector[11659]: = expected local_part or at_domain

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Interesting situation

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So one of the clients’ emails contained � for some reason

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Kumo just rejects the email address

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Pretty funny because Golang’s official mail validator thinks that it’s a valid email address

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Replacement character � should be valid as per RFC 6532

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But obviously not practical

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I just tried it with Gmail.

Delivered-To: XXXXXXXXXXX+�@gmail.com

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Worked fine

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It looks like Gmail doesn’t mind it

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I’m just gonna add a rule to reject any emails with this character

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One thread per question pls.

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Yep, no stress. It was related because it was causing my connector to keep sending the failed email again and again

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But gotcha, thank you