Feb 02 2023 08:48 AM
Hello Everyone,
I've an issue which i cannot see what is happening, If I send an email to a gmail account, it works perfectly. but if I send an email to a custom address and that specific address is diverting to gmail. I receive this message below.
email address removed for privacy reasons
Remote Server returned '550-5.7.26 This message does not pass authentication checks (SPF and DKIM both 550-5.7.26 do not pass). SPF check for [mydomain.com] does not pass with ip: 550-5.7.26 [2a01:XXX:fXX0:fe13::202].To best protect our users from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26 https://support.google.com/mail/answer/81126#authentication for more 550 5.7.26 information. v18-20020a17090610d245c668415si19935811ejv.687 - gsmtp'
example: I sent an email to Xpt @domain and this email is is diverting to gmail mail
my spf is correct.
Feb 02 2023 02:59 PM
Feb 02 2023 05:22 PM
Feb 03 2023 02:17 AM - edited Feb 03 2023 02:45 AM
it's a mail forwarding and we are using exchange 2016 version 15.1 (2308.8) , I could replicate this. I have an hotmail account which is forwarding to a gmail account, if I send an email to gmail works fine, if I send an email to hotmail account I got this specific error.
@gmail
Remote Server returned '550-5.7.26 This message does not pass authentication checks (SPF and DKIM both 550-5.7.26 do not pass). SPF check for [DOMAIN.COM] does not pass with ip: 550-5.7.26 [].To best protect our users from spam, the 550-5.7.26 message has been blocked. Please visit 550-5.7.26 for more 550 5.7.26 information. v18-20020a17090610d200b008845c668415si19935811ejv.687 - gsmtp'