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Questions tagged [smtp-auth]

131 questions
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Postifx: how can someone send e-mail without authorization with this configuration?

Yesterday I found that 10 thousand e-mail messages were sent through my system using this configuration: http://pastebin.com/bThpH1s8 - main.cf http://pastebin.com/kkxxsstP - master.cf I temporarily blocked the whole spamer's ISP's IP range, but…
Ernestas
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Roundcube, Postfix and SMTP authentication (CRAM-MD5) error

I'm having trouble configuring Roundcube with SMTP authentification on Postfix. All the credentials are true, because I have no problem using the e-mail from Thunderbird and my mobile phone e-mail client. Here is the SMTP configuration for…
Ion
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Ruby on Rails application throws SMTP Authentication Error

I'm developing a Rails app which when I run it locally, it's able to send emails through a gmail account via smtp. When I moved it to my server, it comes up with the following error for example when I try to create a new…
Spoons
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SMTP Question. Why does send succeed when Authentication fails

I have an application written in .NET framework that sends emails using our STMP server. I was researching another emailing issue which caused me to look at the SMTP logs. Here is a sample SMPT log entry... 00:10:35 [64.77.200.185][43483994] rsp:…
Seth Spearman
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Network Hardware supports SMTP, but no AUTH information... Need to Send emails through SMTP with AUTH

I have a network device that supports sending email notifications, but doesn't provide for the username and password. I would like to point this device to an internal system which would then take care of sending the email using our actual email…
AJ.
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Postfix+sasslauthd+PAM How can I deny/allow specific users from authenticating?

I have a simple postfix installation on RedHat that's been running fine for years and uses TLS/saslauthd/PAM to allow users to authenticate to relay mail from the external network. All users are local linux accounts, so the saslauthd method using…
OpenSkeptic
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nginx mail module always passing PLAIN method AUTH command to backend

I have implemented a nginx with mail module, and proxy to backend Hmail server. I realized no matter how I disable the auth-methods PLAIN. The nginx is just ignoring it. How can I force to using smtp_auth login instead? As Hmail server does not…
woon minika
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Postfix: how to use SASL authentication?

Hi I am trying to use a very simple sasl authentication. I have been testing the method here but still encounter error. my server is a fresh install server. And the command I run: # saslpasswd2 -c -u `postconf -h mydomain` user1 Password: Again…
sloweriang
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"535 5.7.8 Error: authentication failed: authentication failure" with postfix and dovecot sasl authentication

I'm testing remote smtp login on a server and keep getting 535 5.7.8 Error: authentication failed: authentication failure errors in the syslog and mail.log. Postfix is configured to use system user names and passwords. I generated a user name and…
StevieD
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Forward plain-text emails to TLS enabled SMTP server?

I am running old applications that are not supporting any encryption/authentication protocol on outgoing e-mails. Is it possible to send plain-text emails to a local "relay" server that forward it to a TLS enabled SMTP server?
ELCouz
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How to debug "lost connection after STARTTLS"?

We have a web server which sends mail out via our Postfix relay over a LAN connection. Users from outside our network also send mail out via SMTP AUTH though that relay too. However, we have a webmail application (Roundcube) on the web server that…
TommyPeanuts
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“smtp;550 5.6.0. Sorry, looks like SPAM to me”

I'm applying for a tech support job and I got a test that I have a week to complete, so I assume they expect me to do some research for it, so I was wondering if anyone here might be willing to lend a hand. I'm supposed to give my response to a…
Dimitri001
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TLS from unknown: No client certificate presented

We have setup a windows server virtual SMTP (under IIS6 manager). In the SMTP settings, TLS encryption is enabled, fqdn field is "sharepoint.mycompany.com". In the server's cert store "personal" folder we have the certificate…
Mark
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How to identify mail user from Syslog and mail.log?

I have a user on my system who appears to be sending large quantities of mail and I'm having difficulty identifying who he is. I don't know his IP address or username by which he authenticated. One such entry from the syslog is: root@s2:~# zgrep…
Peter White
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Postfix auth issue

I'm currently facing auth issue. When I'm trying to auth via telnet, I face an issue "535 5.7.8 Error: authentication failed: authentication failure" I use password and login the same, as I use for login in my server, but It says, that login…
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