I got this error when I screwed up my SPF record. YMMV.
On Thu, May 01, 2025 at 04:18:42PM -0700, Joe Muller via mailop wrote: > We have a colocated customer who is reporting their outbound mail is being > rejected when emailing gmail.com addresses. > > The customer's mail server is at 157.131.30.2, part of a larger block we are > using for business static IP customers. The message their receive from > Google (on 20250426) is as follows: > > <redac...@gmail.com>: host gmail-smtp-in.l.google.com[142.251.2.26] said: > 550-5.7.1 [157.131.30.2] The IP you're using to send mail is not authorized > to 550-5.7.1 send email directly to our servers. Please use the SMTP relay > at your 550-5.7.1 service provider instead. For more information, go to 550 > 5.7.1 https://support.google.com/mail/?p=NotAuthorizedError > 41be03b00d2f7-b15f88876f4si8236173a12.185 - gsmtp (in reply to end of DATA > command) > > Does Google operate its own list similar to the SpamHaus PBL that would > cause mail to be rejected? A lookup in SpamHaus' tool shows no problems. > > Anyone here from Google or with similar experience willing to contact me on > or off-list with more information? Thanks. > > -- Joe Muller > System Operations > Sonic. > > _______________________________________________ > mailop mailing list > mailop@mailop.org > https://list.mailop.org/listinfo/mailop -- Michael W.(Warren) Lucas https://mwl.link/ _______________________________________________ mailop mailing list mailop@mailop.org https://list.mailop.org/listinfo/mailop
