forwarding (SPF error?) and Return-Receipt bounce issue

forwarding (SPF error?) and Return-Receipt bounce issue

Hi, I’m trying to find solution but I must ask you guys for help.

    (ultimately generated from
    SMTP error from remote mail server after MAIL FROM:<> SIZE=3006:
    host []: 550 SPF Error:
    Received-SPF: neutral ( is neither permitted nor denied by domain of client-ip=;;

#1 : In this scenario I’m creating a mail from –TO–> [domain set on DA box on its 2nd IP] (which also forwards to [external mail] ]) and that forwarding ends with aforementioned bounced error message ( is a main IP of DA box)

from domain dns administration

Code:        TXT        "v=spf1 a mx ip4: ~all"

what is more

#2 users mails with Return-Receipt flag bounces to admin account on the box with [Delayed Bounce]?? Is that because of when /etc/virtual/limit_unknown reaches it’s max?

Any chances to help figure it out that bounce-mess 🙂 ? Big thanks in advance.

using SpamBlockerTechnology* powered exim.conf, Version 4.1
my exim.conf

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