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Questions tagged [smtp-auth]

131 questions
33
votes
3 answers

POSTFIX fatal: no SASL authentication mechanisms

I am struggling with the error above for more than 5 hours. I had tried to remove Postfix completely and I had followed the instructions of the next manual and the SASL manual in order to reinstall it. When I am trying to login with telnet, the…
user2979757
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3 answers

How to enforce sender address to be "logged-in-user@example.org" in Postfix?

I have set up a Postfix server with SMTP AUTH (STARTTLS on port 587). All my users are in the domain "example.org". I want to enforce the sender address to be "logged-in-user@example.org". I learned that this can be achieved with the main.cf…
Chris Lercher
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10
votes
1 answer

Postfix Recipient address rejected: Access denied Error

Trying to use zend mail smtp to send email from my php app login authenticated and give me this constant error I don't have to deal with I look into de 36 question here on serverfault.com changing parameters as they explain without success. The…
MikZuit
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9
votes
3 answers

Can't get SASL auxprop/sasldb working with postfix/Ubuntu 12.04

I have an Ubuntu 8.04LTS system running Postfix 2.5.1. On that system SMTP AUTH runs fine. The contents of /etc/postfix/sasl/smtpd.conf are: pwcheck_method: auxprop auxprop_plugin: sasldb mech_list: PLAIN The SASL-related properties…
QuantumMechanic
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8
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2 answers

How to add DKIM feature to the IIS 7.5 - Windows Server 2008 - DomainKeys Identified Mail

How to add DKIM feature to the IIS 7.5 - Windows Server 2008 DomainKeys Identified Mail
MonsterMMORPG
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6
votes
2 answers

Postfix deny relay for some virtual users

I'm using Postfix as MTA and relay. Users that wish to send e-mail from a remote system authenticates and Postfix hands that to Dovecot, and this works well. But how can I limit which users can use SMTP+Authentication, without limiting access to POP…
Simon Fredriksson
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5
votes
1 answer

Is Exchange 2010 compliant with RFC 3848

I have looked up Exchange 2010 Support for RFC Standards but do not see RFC 3848 amongst the supported standards. I do see RFC 4954 listed, which 'recommends use of RFC 3848 transmission types', though I cannot tell if this means any mail server…
Winterpool
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1 answer

How can I configure Exim to drop non-authenticated connections on alternate SMTP port?

I currently only allow connections on port 25 from a mail filtering service's IPs. I have Exim running on an alternate port for SMTP submission. This port needs to allow non-encrypted connections for now so I can't rely on forcing TLS on the…
Dave Forgac
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5
votes
3 answers

SMTP-AUTH required for local domains?

Here is the problem: From any IP address not belonging to your mail server: telnet me.myemailserver.com 25 helo me.someserver.com mail from: rcpt to: data This is spam. Buy my stuff. . I'm…
Kilo
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5
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1 answer

Postfix + SASL = "Relay Access Denied" when sending from outside the network

I have in /etc/postfix/main.cf: smtpd_sasl_auth_enable = yes smtpd_recipient_restrictions = permit_sasl_authenticated, permit_mynetworks, reject_unauth_destination and SASL seems to be working: $ testsaslauthd -u yang -p ... -f…
Yang
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4
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2 answers

postfix/dovecot - how to view smtp auth user in log files?

I am using postfix with dovecot and virtual users on a centos 6 system. I had a rush of spam recently, with tons of packs of 50 recipients delivered from an unknown account. The current logging (maillog) does not display anything about SMTP…
Liviu
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4
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1 answer

Exim not always sending AUTH LOGIN username/password

We are sending mail using exim (configured through WHM). With the same exact configuration, seemingly most of the time exim sends the correct AUTH LOGIN username and password, however sometimes it is omitting this part and sendgrid is refusing with…
Jared Farrish
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4
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1 answer

How do I get disabling SMTP plaintext authentication to stick on OS X 10.10 Yosemite's Server.app

I've got an SMTP relay server that I recently replaced with OS X 10.10 Yosemite running Server.app. It is running as an SMTP-only relay allowing only hosts from the LAN to relay out through it. We do this so that all mail from our subnet is…
morgant
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4
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1 answer

What does an empty AUTH EHLO SMTP response mean with MS Exchange?

I'm a programmer, not a sys-admin, but my customer's sys-admins are not being helpful and after much googling I still can't find the answer to this. My Java application gets the following response from my customer's MS Exchange following EHLO EHLO…
Glenn Lawrence
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4
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3 answers

Security Risk involved in disabling SMTP authentication on POP3 Server?

I provide IT Services to a client who, for the longest time in the world, has been using a POP3 server from Network Solutions to handle their email. At this time, I'm introducing the McAfee SaaS email protection to give their email some type of…
steve02a
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