# Fix email authentication for spotify.com

You are working on the DNS and mail configuration for spotify.com.
Measured by MailAuthWatch on 17 Oct 2026 from public DNS. Grade A (100/100).
Report: https://www.mailauthwatch.com/check/spotify.com

## What is published right now (do not assume anything else)
- SPF (TXT spotify.com): v=spf1 ip4:80.76.146.172 ip4:80.76.146.173 include:_spf.google.com include:servers.mcsv.net include:_spf.salesforce.com include:_spf.netigate.se include:21894833.spf06.hubspotemail.net ~all   — valid, 6 of 10 lookups
- DMARC (TXT _dmarc.spotify.com): v=DMARC1; p=reject; sp=reject; pct=100; fo=1; rf=afrf; rua=mailto:6jxge2ly@ag.eu.dmarcian.com;
- DKIM: google._domainkey (1024-bit), k1._domainkey (1024-bit), s1._domainkey (2048-bit), s2._domainkey (1024-bit), mandrill._domainkey (1024-bit), cm._domainkey (1024-bit), zendesk1._domainkey (2048-bit), zendesk2._domainkey (2048-bit), krs._domainkey (1024-bit), mte1._domainkey (2048-bit), mte2._domainkey (2048-bit), smtpapi._domainkey (1024-bit)
- MX: aspmx.l.google.com, alt1.aspmx.l.google.com, alt2.aspmx.l.google.com, aspmx5.googlemail.com, aspmx2.googlemail.com, aspmx4.googlemail.com, aspmx3.googlemail.com  → Google Workspace
- Nameservers: ns-cloud-a3.googledomains.com, dns1.p07.nsone.net …  → records are managed in Google Cloud DNS

## Tasks, in order of impact
### 1. 7 DKIM keys are 1024-bit.
Why: Selectors google._domainkey, k1._domainkey, s2._domainkey, mandrill._domainkey, cm._domainkey, krs._domainkey, smtpapi._domainkey are under 2048 bits, which some receivers already downgrade. 
Rotate to a 2048-bit key at the sending service.

## Rules
- Publish exactly one SPF record; never add a second v=spf1 TXT.
- Do not remove any include: or ip4: you cannot account for; mail may depend on it.
- Do not set DMARC to p=reject in one step; stage through p=none → quarantine → reject.
- Show the planned DNS changes as a diff (record, old value, new value) before applying them.
- If you cannot access Google Cloud DNS or Google Workspace, stop and say exactly what access you need.

## Verify
  dig +short TXT spotify.com
  dig +short TXT _dmarc.spotify.com
Then open https://www.mailauthwatch.com/check/spotify.com?fresh=1 and confirm:
  the grade is unchanged and no new issues appear. Target grade: A.

## Report back
List each record you changed (name, type, old value, new value), what you verified, and anything you could not do.