Port 587 Submission
SMTP Mail Submission
About Port 587
Port 587 is the standard port for email submission from mail clients (MUA) to mail servers (MTA). It typically requires authentication and supports STARTTLS encryption.
Security Notes
Always require authentication and STARTTLS on port 587. This prevents unauthorized mail relay and protects credentials during transmission.
Total Hosts
11.8M
TLS Encrypted
0.0%
Vulnerable Hosts
2.2M
Countries
10+
Top Services
| smtp | 11,767,153 |
| ftp | 11,795 |
| smtp-proxy | 5,631 |
| mysql | 2,651 |
| ssh | 2,568 |
| http | 1,781 |
| lmtp | 1,461 |
| telnet | 1,020 |
| vnc | 570 |
| imap | 425 |
Top Countries
 United States |
2,699,417 |
 Germany |
1,352,556 |
 Japan |
798,890 |
 Netherlands |
684,366 |
 France |
505,164 |
 United Kingdom |
426,959 |
 Canada |
315,171 |
 Romania |
283,873 |
 Russia |
268,753 |
 Poland |
263,785 |
Top Products
| Exim smtpd | 4,245,466 |
| Postfix smtpd | 3,881,612 |
| Microsoft Exchange smtpd | 243,033 |
| Sendmail | 185,550 |
| Exim | 107,235 |
| MailEnable smptd | 100,944 |
| cbdev cmail smtpd | 84,850 |
| Kerio Connect smtpd | 58,757 |
| Postfix | 56,464 |
| Haraka | 47,756 |