SoftFail means the IP address may or may not be authorized to send from the domain.

Update your SPF record with your sending server or IP address information.The SPF record does not contain the sending server or IP address used for sending email to the mailbox provider. Fail means the IP address is not authorized to send from the domain.The SPF record, with the correct syntax, was successfully verified by the mailbox provider.Pass means the IP address is authorized to send from the domain.If you want to assert that only you can send for your IP, then change the qualifier to ~ (~all) or - (-all).SPF records with this result are typically using the ? qualifier (?all). A Neutral result is treated the same as a None result.

Neutral means the domain owner stated in the SPF record that they do not want to assert that the IP address is authorized to send from the domain.(The Return-Path address is also known as the MFrom or envelope-sender address.) In order to set up SPF you need to create an SPF record for your Return-Path address with your sending server or IP address information.None means no SPF record was found for the domain.The verification results reported from mailbox providers are: If you need to create or edit your SPF record, contact your email administrator, Email Service Provider (ESP) or domain hosting provider. The technical details as described below can also be found in RFC7208. Look for SMTP responses from mailbox providers such as Gmail, Yahoo!, AOL, and Microsoft (). When checking for verification results, remember that not all mailbox providers use SPF authentication in their spam filters.

) mx. esmtp id f6si4349525pba.278.1969.12.31.16.00.00 mon, 03:21:51 -0700 (pdt) received-spf: softfail (: domain of transitioning not designate 98.136.240.39 permitted sender) client-ip=98.136.240.39 authentication-results: mx. spf=softfail (: domain of transitioning not designate 98.136.240.39 permitted sender) received: .com (.com ) .net (postfix) esmtp id 764e0511eb mon, 10:21:35 +0000 (utc) received: (from .com (8.14.4/8.14.4/submit) id r97alzij005899 mon, 03:21:35 -0700 date: mon, 03:21:35 -0700 message-id: to: subject: client invoice from: mime-version: 1.Sender Policy Framework (SPF) authentication verification results should be returned back to the sending Mail Transfer Agent (MTA) during the SMTP conversation. Mail sent php not delivered clients, suspecting due spf test returning softfail domain of transitioning.

Softfail domain of transitioning