PEC Bridge: mail not delivered with no notification to the recipient

[lucagasparini]

In some cases the NethServer SMTP server refuses the delivery of the message downloaded from the pec bridge fetcher and the recipient of the PEC has no evidence of this. A classic example is exceeding the maximum message size limit that prevents delivery. In this case it is necessary to notify the recipient of the non-delivery with a message.

Steps to reproduce

• set the maximum message size limit on Postifix to 10 MB
• configure a fetcher account on the PEC Bridge
• send a message with an attachment of at least 11 MB to the PEC mailbox of the provider
• wait for the message to be downloaded from the provider

Expected behavior

• the message cannot be delivered and the recipient receives a notification with the error of non-delivery and the reason

Actual behavior

• the message is not delivered and the recipient has no evidence of this. Only in the pec bridge log is this reported:

  [Mailboxes] ERROR com.sonicle.pecbridge.Mailbox - messaging error during transfer of message
  com.sun.mail.smtp.SMTPSendFailedException: 552 5.3.4 Error: message file too big
  
      at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2267)
      at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:2045)
      at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1260)
      at com.sonicle.pecbridge.Relay.sendMessage(Relay.java:108)
      at com.sonicle.pecbridge.Mailbox.trasnferMessages(Mailbox.java:89)
      at com.sonicle.pecbridge.Main.run(Main.java:198)
      at java.lang.Thread.run(Thread.java:748)

Components

nethserver-webtop-pecbridge

[nethbot]

in 7.9.2009/nethesis-testing:

• nethserver-webtop-pecbridge-2.2.0-1.1.g48572e1.ns7.noarch.rpm x86_64

[gsanchietti]

Test case Check the bug is not reproducible

[lucagasparini]

With the new rpm, the recipient receives an e-mail notification like this:

The log shows the sending of the notification:

15:39:26.713 [Mailboxes] ERROR com.sonicle.pecbridge.Mailbox - messaging error during transfer of message
com.sun.mail.smtp.SMTPSendFailedException: 552 5.3.4 Error: message file too big

        at com.sun.mail.smtp.SMTPTransport.issueSendCommand(SMTPTransport.java:2267)
        at com.sun.mail.smtp.SMTPTransport.finishData(SMTPTransport.java:2045)
        at com.sun.mail.smtp.SMTPTransport.sendMessage(SMTPTransport.java:1260)
        at com.sonicle.pecbridge.Relay.sendMessage(Relay.java:108)
        at com.sonicle.pecbridge.Mailbox.trasnferMessages(Mailbox.java:89)
        at com.sonicle.pecbridge.Main.run(Main.java:198)
        at java.lang.Thread.run(Thread.java:748)
15:39:27.770 [Mailboxes] ERROR com.sonicle.pecbridge.Mailbox - mail notification of the error has been sent to lucag@ns20.neth.eu

The bug can be considered fixed 👍

[nethbot]

in 7.9.2009/nethesis-updates:

• nethserver-webtop-pecbridge-2.2.1-1.ns7.noarch.rpm x86_64