Die folgende Tabelle vergleicht bekannte Anbieter von E-Mail-Adressen. Es werden ausschließlich die in den MX-Records angegebenen SMTP-Server überprüft (kein POP3/IMAP).
| Providers | STARTTLS | Certificates | Protocol | |
|---|---|---|---|---|
| 1&1 | Available | Not checked |
—
|
|
| 5x2.de | Available | Not checked | DANE | |
| aikQ Mail | Available | Problems found | — | |
| AOL | Available | Trustworthy | — | |
| Apple iCloud | Available | Trustworthy | — | |
| Arcor | Available | Not checked | DANE | |
| Brief Gemeinde | Available | Not checked | — | |
| canineworld.com | Available | Not checked | — | |
| directBOX | Available | Not checked | DANE | |
| Domainfactory | Available | Not checked | — | |
| eclipso | Available | Not checked | DANE | |
| emailn.de | Available | Not checked | DANE | |
| Problems found | Problems found | — | ||
| Firemail | Available | Not checked | DANE | |
| Freemailer.ch | Available | Trustworthy | — | |
| freenet | Available | Not checked |
DANE
|
|
| ghandi.net | Available | Problems found | — | |
| Gmail | Available | Trustworthy | — | |
| GMX | Available | Trustworthy |
DANE
|
|
| Guru | Available | Not checked | — | |
| Hotmail | Available | Not checked | — | |
| Hushmail | Available | Trustworthy | — | |
| Kolab Now | Available | Not checked | DANE | |
| Luxweb | Available | Not checked | — | |
| Lycos | Available | Problems found | — | |
| mail.de | Available | Not checked | DANE | |
| mail.ru | Available | Not checked | — | |
| mail4nature.org | Not checked | Not checked | — | |
| mailbox.org | Available | Trustworthy | DANE | |
| Maili.de | Not checked | Not checked | — | |
| new-post.de | Available | Not checked | — | |
| ok.de | Available | Trustworthy | — | |
| one.com | Available | Not checked | DANE | |
| Outlook.com | Available | Not checked | — | |
| Overmail.de | Available | Not checked | — | |
| OVH | Available | Trustworthy | — | |
| Ownbay | Available | Trustworthy | — | |
| OYOONY | Not checked | Not checked | — | |
| Posteo | Available | Trustworthy | DANE | |
| Raketenmail | Available | Not checked | — | |
| Rediff | Available | Not checked | no PFS Weak ciphers | |
| Sify | Available | Not checked | — | |
| Slucia | Available | Trustworthy | — | |
| Smart-Mail | Available | Not checked | DANE | |
| Softhome | Problems found | Not checked | — | |
| Strato | Available | Trustworthy |
—
|
|
| T-Online | Problems found | Not checked |
—
|
|
| Thexyz | Available | Not checked | no PFS DANE | |
| UIMS Freemail | Available | Problems found | — | |
| Uni.de | Available | Not checked | — | |
| Unitymedia | Available | Trustworthy | DANE | |
| Vodafone | Available | Not checked | DANE | |
| Web.de | Available | Trustworthy |
DANE
|
|
| YAHOO! Mail | Available | Trustworthy | — | |
| Yandex | Available | Not checked | — | |
| ZELX Freemail | Available | Trustworthy | — |
Heartbleed