Hi Eric, Biju, thanks for your advise.
My spftbehaviour setting is 3 in my server. On Thu, Jun 27, 2019 at 9:34 PM Eric Broch <ebr...@whitehorsetc.com> wrote: > What's your SPF setting in /var/qmail/control/spfbehavior? > On 6/27/2019 3:14 AM, ChandranManikandan wrote: > > Hi Friends, > > One of our sender try to send an email to our domain but they got bounced > back with this message 451 SPF lookup failure (#4.3.0). > > I am running qmailtoaster in centos 6 32 bit. > We are able to send email to this sender but unable to receive it and they > got bounced back email. > Is the issue is our server or their server. > how to fix this > Anyone can help me. > > > -- > > > *Regards, Manikandan.C * > > -- *Regards,Manikandan.C*