On Fri, 1 Feb 2019 15:50:14 +0100 Paolo Barbato <paolo.barb...@igi.cnr.it> wrote:
> Dear Enrico, > > it seems that your domain hasn't any SPF entry in DNS. > > dig txt cerm.unifi.it > > Fighting spammers is hard, so at least SPF have to be used to > legitimate your IPs. > > DKIM and DMARC are other ways...somewhat more complex to implement. > > Regards, > Paolo. > Thanks Paolo, I'm not the domain administrator, so I'll ask to our network provider to put SPF record in our DNS servers. > > > On 1 Feb 2019, at 15:41, Enrico Morelli <more...@cerm.unifi.it> > > wrote: > > > > Dear all, > > > > I having some problem forwarding some emails to Gmail addresses. > > Sometime the emails are bounced cause: > > > > This message does not have authentication information or fails to > > pass 550-5.7.1 authentication checks. To best protect our users > > from spam, the 550-5.7.1 message has been blocked. Please visit > > 550-5.7.1 > > https://support.google.com/mail/answer/81126#authentication for > > more 550 5.7.1 information. k11si3359248wrp.39 - gsmtp (in reply to > > end of DATA command)) > > > > I'm sure that these emails aren't spam. > > > > Someone can explain me why? Is there some misconfiguration in my > > mail server? > > > > Thanks > > > > -- > > ----------------------------------------------------------- > > Enrico Morelli > > System Administrator | Programmer | Web Developer > > > > CERM - Polo Scientifico > > via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY > > ------------------------------------------------------------ > > ------------------------------------------------------------------------------------------------ > Paolo Barbato > > Consorzio RFX > <https://www.igi.cnr.it/>corso Stati > Uniti,4 35127 Padova - Italy > Network Administrator > phone: +39 049 8295097 fax: +39 049 8700718 > ------------------------------------------------------------------------------------------------ > -- ----------------------------------------------------------- Enrico Morelli System Administrator | Programmer | Web Developer CERM - Polo Scientifico via Sacconi, 6 - 50019 Sesto Fiorentino (FI) - ITALY ------------------------------------------------------------
