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Questions tagged [smtp-auth]

131 questions
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SMTP authentification request transfer to another SMTP

I'm having an issue that's above my competence level. As we're working on improving the security measures that are in place in our network, we found (among others) one flaw that we have no idea how to fix. We have our own SMTP server locally based…
Tom
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Dovecot doesn't create /var/spool/postfix/private/auth

I'm moving an Ubuntu 14.04 postfix mail installation from one machine to another. The current setup works fine pretty much with Ubuntu's default postfix and dovecot setup so that users can use SMTP auth, etc. So I copied the relevant configuration…
TommyPeanuts
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check header for Authenticated sender in postfix

My users send email with SMTP AUTH via SASL Authentification. Unfortunately their mails would marked as NoBounceOpenRelay by Amavis. So I set this to postfix main.cf smtpd_sasl_authenticated_header = yes Is it possible to tell amavis checking this…
MarcJ
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IIS 6 SMTP unable to relay messages to Exchange Online

Our company uses Office 365 and our email is hosted on Exchange online; however, we have several applications which are unable to send messages directly to Exchange Online due to various reasons (mainly lack of support for authenticated SMTP with…
Massimo
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Postfix on Ubuntu won't send emails "No such file or directory '/etc/postfix/cacert.pem'"

I'm trying to get postfix set-up on Ubuntu 13.04 but no luck so far. I found a few answers here on ServerFault that didn't work. I re-installed a bunch of times, nothing. This is my first time dealing with it, I followed this tutorial and this one.…
elclanrs
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5 answers

Postfix: Allow SMTP AUTH only from specified IP address ranges

can one implement an IP address based restriction for SMTP AUTH in Postfix? Scenario: I'm running a Postfix mail server that receives mails from all over the Internet. But the server doesn't only receive mails, it also allows its authenticated…
MrSnrub
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Reject Exim authentication attempts based on username

Is it possible to set up Exim so that, based on the username passed along to it, it can reject an authentication attempt before it will try to do a password lookup for that username? I've done similar with Dovecot for incoming mail check attempts…
Bastille
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Spamhaus PBL stops email even though SMTP-AUTH is enabled

My emails to D-Link get bounced due to my Comcast IP being on the Spamhaus PBL. Spamhaus says there's no way to get removed from the list and the only way to bypass this filter is to enable SMTP-AUTH. However, I am connecting to my host's (Total…
Piotr
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2 answers

Exim not Listening on port 465 or 587 for TLS connection

I am configuring Exim on a Ubuntu server to send and receive mails via TLS. Followed many guides which shows on how to configure Exim with TLS but still my Exim doesn't listen on 465 or 587 Exim only listen's on port 25 and I am able to send an…
Sachin
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postfix not working correctly after system upgrade (no SASL authentication mechanism)

I had a working postfix/dovecot configuration running on a Ubuntu Server machine 14.04 LTS. Then I made a upgrade to 16.04.2 using do-release-upgrade. Everything seemed to work besides my mail service. Before the update everything worked but now I…
C0dR
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Exim: Force email auth for users of local domains

I'm configuring exim4 for virtual users with dovecot and postgresql and I got a problem I cannot resolve, the situation is this: I need that when a 'localdomain' user tries to send a email to another 'localdomain' user or foreign user, needs to…
travatuh
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Postfix permit localhost use plain login

I have postfix 2.11 setup on Debian jessie with Dovecot SASL and I require encrypted login mechanism to send mail via smtp. For this purpose in the main.cf I've smtpd_tls_auth_only = yes option set. I'm happy with results, but I want to allow…
BartQ
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1 answer

Authenticating SMTP Proxy

I have acquired a number of mail users, and I'm wanting to transition them away from their current mail server and onto mine. I've set up perdition as a proxy which will allow me to proxy IMAP and POP connections - and I have control of the DNS…
davidgo
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Enabling smtp authentication on postfix with users in another smtp server

I am trying to replace an existing qmail installation with postfix. Qmail is currently authenticating outgoing smtp from users clients with a perl script. This script checks user's provided username+password performing a AUTH LOGIN check on another…
golemwashere
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Postfix "AUTH-LOGIN" no longer being offered for smtp auth after upgrade from Ubuntu 10.04 to 12.04.1

After doing a major Ubuntu dist upgrade from 10.04 to 12.04, my virtual-user postfix / dovecot installation only offers "PLAIN" SMTP Authentication mechanism. It used to offer PLAIN + LOGIN mechanisms, and I have tried everything under the sun to…
Dale C. Anderson
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