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SMTP - Dropped due to TLS engine error: FLOW_TIMEOUT[5] - can't send emails from printers using tls

Philipp Marx

Hi, 

scan to email does not work by using TLS with our HP Officejet Pro printers. The connection will be not established and I tried meanwhile a separate firewall rule from internal printers to WAN without any security and a separate "don't decrypt SSL rule ". 

But I receive still a error and it does not work:

2020-09-21 13:09:17

Do not decrypt

19004

5

Maximum compatibility

172.20.12.246

40.101.81.146

IPAddress

40.101.81.146

TLS_RSA_WITH_AES_256_GCM_SHA384

2020-09-21 13:09:12

Error

19006

5

Maximum compatibility

172.20.12.246

40.101.81.146

IPAddress

40.101.81.146

Dropped due to TLS engine error: FLOW_TIMEOUT[5]

2020-09-21 13:05:38

Error

19006

5

Maximum compatibility

172.20.12.244

52.97.176.34

IPAddress

52.97.176.34

Dropped due to TLS engine error: FLOW_TIMEOUT[5]

Any Idea to solve this?



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  • 0

    Hi,

    the answer is to put an exception and that then defeats the purpose of scanning. Does the printer have a CA installed?

    Try using the XG mail proxy with smtp/s scanning enabled.

    Ian

    XG115W - v19.5.1 mr-1 - Home

    If a post solves your question please use the 'Verify Answer' button.

  • 0 in reply to rfcat_vk

    We use office365, no XG mail. Until now it was not necessary to use a certificate. Which exception do you mean?

  • FormerMember
    0 FormerMember in reply to Philipp Marx

    Hi ,

    Thank you for reaching out to the Community! 

    If you did not configure email protection on the XG firewall, please disable the SMTP/SMTP scanning rule. This rule is auto created for email protection in MTA mode.

    Thanks,

  • 0 in reply to FormerMember

    Thanks for your feedback. I have disabled the SMTP scanning. The error still occurs. 

    If I change the settings from 587 TLS to our relay port 25 the scan to email works. 

    I figured out that this happens with HPOfficejetPro8730 8720 Serie only.

    I tested the settings with an HPOJPro9020 , the same TLS settings port 587 and scan to email works without the log entry "Dropped due to TLS engine error: FLOW_TIMEOUT[5]".

    #wastedlifetime

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