CPU spikes when sending to inexistent domains

[Rafael Batiati]

My QA team just sent a batch of 10k e-mail messages to an inexistent domain (e.g. [e-mail]) and that operation caused the server to hang for several minutes with 100% CPU usage.

We repeated the same batch of 10k e-mail messages but this time using an inexistent account on a valid domain (e.g. [e-mail]) and no issue was observed.

Version 2.3.7

[SH]

There might be Haraka related issue, see https://github.com/haraka/Haraka/issues/3100

[Rafael Batiati]

Thank you @SH

Do you have any suggestions for a workaround? I’ve read the GH issue but I have no clue about where I should set the config acquireTimeoutMillis on my poste.io deployment.

I’ve created the “notexists.org” domain on my own mail server, and it seems to have solved the problem. It’s ok since I can predict the “unknown” domain my users are going to use, but it isn't really a general-case workaround.

[SH]

Which version are you using? I’ve tried to dig deeper to the issue and everything worked as expected.

There was similar Haraka looping bug which was fixed couple versions ago

[Rafael Batiati]

Version 2.3.7, I’m going to update to the latest and ping you back.

Thank you.

[SH]

Please try latest version, there were some changes at Haraka