DNS launch checklist
Configure these once after the upstream provider activates plumber.email. Replace placeholder provider values with exact OpenSRS cluster records before launch.
| Type | Name | Value |
|---|---|---|
| MX | plumber.email | mx.plumber.email.cust.b.hostedemail.com |
| TXT | plumber.email | v=spf1 include:_spf.hostedemail.com ~all |
| TXT | _dmarc.plumber.email | v=DMARC1; p=quarantine; rua=mailto:dmarc@plumber.email |
| TXT | pe20260521._domainkey.plumber.email | OpenSRS DKIM public key |
| CNAME | mail.plumber.email | mail.plumber.email.cust.b.hostedemail.com |
| URL | Webmail | https://mail.b.hostedemail.com |
| A | autoconfig.plumber.email | 76.76.21.21 |
| CNAME | autodiscover.plumber.email | plumber.email |
| SRV | _imaps._tcp.plumber.email | 0 1 993 mail.b.hostedemail.com |
| SRV | _pop3s._tcp.plumber.email | 0 1 995 mail.b.hostedemail.com |
| SRV | _submissions._tcp.plumber.email | 0 1 465 mail.b.hostedemail.com |
Operational notes
Keep support@plumber.email, abuse@plumber.email, postmaster@plumber.email, and dmarc@plumber.email reserved internally. Those addresses should never be sold.