Hugo, You  are trying to connect to port 587 in your localhost address (127.0.0.1). Do you have a TLS smtp enabled service running on that port? You probably don’t. Instead you should have the hostname of ip address of an external SMTP server that listens on port 587. Certainly on your application that I assume you must configure ip address 127.0.0.1 as smtp destination server.  Hope this helps.   RegardsJose On Tuesday, July 30, 2024 at 12:00:46 PM GMT-5, Hugo Sarkissian via stunnel-users stunnel-users@stunnel.org wrote:

Hello,

Tried to configure stunnel linked to pdm (solidworks)

When I try I have an error :  Service [ssmtp] started

2024.07.30 15:01:27 LOG7[1]: Setting local socket options (FD=1184)

2024.07.30 15:01:27 LOG7[1]: Option TCP_NODELAY set on local socket

2024.07.30 15:01:27 LOG5[1]: Service [ssmtp] accepted connection from 127.0.0.1:60652

2024.07.30 15:01:27 LOG6[1]: Peer certificate not required

2024.07.30 15:01:27 LOG7[1]: TLS state (accept): before SSL initialization

2024.07.30 15:01:37 LOG7[1]: TLS alert (write): fatal: record overflow

2024.07.30 15:01:37 LOG3[1]: error queue: ssl/record/rec_layer_s3.c:645: error:0A000139:SSL routines::record layer failure

2024.07.30 15:01:37 LOG3[1]: SSL_accept: ssl/record/methods/tls_common.c:654: error:0A0000C6:SSL routines::packet length too long

2024.07.30 15:01:37 LOG5[1]: Connection reset/closed: 0 byte(s) sent to TLS, 0 byte(s) sent to socket

2024.07.30 15:01:37 LOG7[1]: Local descriptor (FD=1184) closed

2024.07.30 15:01:37 LOG7[1]: Service [ssmtp] finished (0 left)

My config :

; Configuration de Stunnel

; Niveau de journalisation

debug = 7

output = stunnel.log

; Service SMTP sécurisé

[ssmtp]

accept = 127.0.0.1:25

connect = 127.0.0.1:587

cert = C:\Program Files (x86)\stunnel\config\stunnel.pem

key = C:\Program Files (x86)\stunnel\config\stunnel.pem

; Protocoles et suites de chiffrement

sslVersion = all

ciphers = ALL:!aNULL:!MD5

renegotiation = no

options = NO_SSLv2

TIMEOUTclose = 0

Can you help me please

| | Hugo SarkissianIT Operation Support Technician Piab Group Montelier FR(+33) 7 88 06 22 31Hugo.Sarkissian@piabgroup.com

|

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