For generating new SPF records you can use this free tool      SPF-Generator What is an SPF Record? An SPF (Sender Policy Framework) record is used to indicate which hosts are authorised to send emails for a domain. It is defined in RFC 4408 and clarified...

A quick checklist for email deliverability. S.N Item Subitem Checklist 1 Check the IP addresses of SMTP servers for blacklisting 2 Check the sending domain for blacklisting 3 Set the SPF record 4 Set the DKIM 5 Set the DMARC 6 Set the PTR / rDNS for sending IP address 7 Set A record for sending domain/sub-domain 8 Signup for Google...