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Weird HELO causes my SMTP server to reject.

#1586

Nov 25 11:28:16 hubris postfix/smtpd[3574]: connect from lust.example.com[10.98.84.1]

Nov 25 11:28:16 hubris postfix/smtpd[3574]: NOQUEUE: reject: RCPT from lust.example.com[10.98.84.1]: 554 5.7.1 <contact@cendio.se>: Relay access denied; from=<dap@example.com> to=<contact@cendio.se> proto=ESMTP helo=<[10.98.100.1]>

When I send from lust to hubris the HELO used is not the IF addr used to send the message.
The 10.98.100.1 address cannot be being used, as there is no VLAN path setup. The correct return address is as is seen in the RCPT.

Even though I have added the 10.98.100.8 interface on lust so that postfix adds the 10.98.100.0/24 to the 'mynetworks' list, I still get the reject.

I assume this is because I have not setup a reverse mapping for 10.98.100.1.

How do I get MailMate to supply the correct HELO?

Reported by Damon Permezel · November 25th, 2016 @ 01:41 AM

State: new
Milestone: none
Assigned to: benny benny

Activity

  1. Damon Permezel
    Damon Permezel

    Turns out I do have the reverse DNS correctly setup. At least on hubris. lust is a mac, so precisely what it is doing for any particular process at any given time is a mystery.

    MailMate needs to get the HELO hostname it presents correct, not choose an arbitrary interface address.

    For the time being, I have been forced back to Mail.app, as much of my email will be sent thru hubris.

    November 25th, 2016 @ 06:54 AM

  2. Damon Permezel
    Damon Permezel

    Never mind. Although the HELO is bogus, it was not the reason for the reject.

    November 25th, 2016 @ 07:33 AM

  3. benny
    benny
    • State changed from new to resolved

    Ok. For the record, MailMate has some hidden settings to force the value used, MmSMTPFixedIP and MmSMTPFixedHostname.

    November 25th, 2016 @ 07:42 AM

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