diff options
Diffstat (limited to 'src')
| -rw-r--r-- | src/clamsmtpd.c | 30 |
1 files changed, 27 insertions, 3 deletions
diff --git a/src/clamsmtpd.c b/src/clamsmtpd.c index d32248a..d3a9958 100644 --- a/src/clamsmtpd.c +++ b/src/clamsmtpd.c @@ -33,7 +33,7 @@ * * CONTRIBUTORS * Nate Nielsen <nielsen@memberwebs.com> - * + * Yamamoto Takao <takao@oakat.org> */ #include <sys/time.h> @@ -87,8 +87,10 @@ clamsmtp_thread_t; #define SMTP_DATAVIRUSOK "250 Virus Detected; Discarded Email\r\n" #define SMTP_DATA "DATA\r\n" +#define SMTP_HELO "HELO " #define SMTP_DELIMS "\r\n\t :" +#define HELO_CMD "HELO" #define EHLO_CMD "EHLO" #define FROM_CMD "MAIL FROM" #define TO_CMD "RCPT TO" @@ -676,6 +678,28 @@ static int smtp_passthru(clamsmtp_context_t* ctx) continue; } + /* + * Because many mail servers check for mail loops, we + * intercept HELO commands and send one withour own + * host name. + */ + else if(is_first_word(ctx->line, HELO_CMD, KL(HELO_CMD))) + { + strlcat(ctx->line, SMTP_HELO, LINE_LENGTH); + + r = KL(SMTP_HELO); + + if(gethostname(ctx->line + r, LINE_LENGTH - r) == -1) + strlcat(ctx->line, "clamsmtp", LINE_LENGTH); + + ctx->line[LINE_LENGTH - 1] = 0; + + if(write_data(ctx, &(ctx->server), ctx->line) == -1) + RETURN(-1); + + continue; + } + /* Append recipients to log line */ else if((r = check_first_word(ctx->line, FROM_CMD, KL(FROM_CMD), SMTP_DELIMS)) > 0) add_to_logline(logline, "from=", ctx->line + r); @@ -1110,9 +1134,9 @@ static int transfer_from_file(clamsmtp_context_t* ctx, const char* filename) if(write_data_raw(ctx, &(ctx->server), (char*)g_header, strlen(g_header)) == -1) RETURN(-1); - } - header = 1; + header = 1; + } } if(write_data_raw(ctx, &(ctx->server), ctx->line, strlen(ctx->line)) == -1) |