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SMTP block mails from servers with wrong hostname

Stefan Spirig
Hi,

Some mails will be blocked because the hostname from the sender mailserver is invalid.

Logfile:
Mar  7 00:47:19 (none) exim[12348]: 2003-03-07 00:47:19 rejected EHLO from [161.78.3.250]: syntactically invalid argument(s): rz_excsrv1.kttg.ch
Mar  7 00:47:19 (none) exim[12348]: 2003-03-07 00:47:19 rejected EHLO from [161.78.3.250]: syntactically invalid argument(s): rz_excsrv1.kttg.ch
Mar  7 00:47:19 (none) exim[12348]: 2003-03-07 00:47:19 rejected HELO from [161.78.3.250]: syntactically invalid argument(s): rz_excsrv1.kttg.ch
Mar  7 00:47:19 (none) exim[12348]: 2003-03-07 00:47:19 rejected HELO from [161.78.3.250]: syntactically invalid argument(s): rz_excsrv1.kttg.ch

All options in the Smtp Proxy are switched off, except the virus protection.

How can I disable the hostname/dns check in SMTP-Proxy?

thx ipman  


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  • 0
    confirmed, will be "fixed" in 4.002

    The "fixed" is in quotes since HELO hostname MAY NOT contain underscores by RFC, so it's not exactly our fault [:P]

    Workaround:

    on top of

    /var/chroot-smtp/etc/exim.conf-default

    put

    helo_allow_chars = _

    then stop/start the proxy in WebAdmin.

    /tom