SMTP (linux): Difference between revisions
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(Created page with "SMTP is a plain text protocol. This makes it easy to simulate a mail client with the telnet command to check the access to port 25. ==Test Access to Mail Server with Telnet== $ telnet localhost 25 Trying ::1... Connected to localhost. Escape character is '^]'. 220 corelogs.its.fsu.edu ESMTP Postfix ehlo localhost 250-localhost 250-PIPELINING 250-SIZE 157286400 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 25...") |
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==Test Access to Mail Server with Telnet== | ==Test Access to Mail Server with Telnet== | ||
Example: | |||
$ telnet localhost 25 | $ telnet localhost 25 | ||
| Line 7: | Line 9: | ||
Connected to localhost. | Connected to localhost. | ||
Escape character is '^]'. | Escape character is '^]'. | ||
220 | 220 localhost ESMTP Postfix | ||
ehlo localhost | ehlo localhost | ||
250-localhost | 250-localhost | ||
Latest revision as of 15:40, 26 November 2024
SMTP is a plain text protocol. This makes it easy to simulate a mail client with the telnet command to check the access to port 25.
Test Access to Mail Server with Telnet
Example:
$ telnet localhost 25 Trying ::1... Connected to localhost. Escape character is '^]'. 220 localhost ESMTP Postfix ehlo localhost 250-localhost 250-PIPELINING 250-SIZE 157286400 250-VRFY 250-ETRN 250-STARTTLS 250-ENHANCEDSTATUSCODES 250-8BITMIME 250-DSN 250 SMTPUTF8 mail from: no-reply@localhost 250 2.1.0 Ok rcpt to: dave@davehome.net 250 2.1.5 Ok data 354 End data with <CR><LF>.<CR><LF> Subject: Test Test body. . 250 2.0.0 Ok: queued as 3A83B1102528 quit 221 2.0.0 Bye Connection closed by foreign host.