SMTP is the Simple Mail Transfer Protocol, the most recent standard of which is defined in RFC 5321. It's the Internet standard for sending and receiving email.
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1k views
smtp remote host responds “550 Sender verify failed”
A server I'm taking care of uses qmail for MTA. I can send and receive to almost every domain except one or two that give the following error, or something very similar:
550-Verification failed for ...
0
votes
0answers
165 views
What are the raw SMTP commands to attach a file [closed]
Background:
I am working on a project that involves an SMTP server that I setup on a CentOS 6.4 VM. Basically the Arduino telnets to the SMTP server and sends out an email via postfix commands. The ...
0
votes
3answers
1k views
Something is spamming from my hMail server - how can I deal with this?
My Windows 2008 server is attempting to send out a lot of spam, I've just discovered, and I'm not sure how to see where the compromise is. For example: has someone hacked an account? Has someone ...
0
votes
0answers
47 views
Postfix + Dovecot wont send outgoing mails (only sending to local mails works)
As the title says do i face problems with my postfix configuration since i cant get it to send mails out from the server.
Im running Ubuntu LTS 12.04 on a cloud server.
all the mails i try to send ...
0
votes
1answer
42 views
generic failure for SASL LOGIN
few years ago I've set up my server using this guide: http://flurdy.com/docs/postfix/ at that time machine was running ubuntu 8.04 LTS, recently I've updated machine to 12.04 LTS but can't force SASL ...
1
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0answers
40 views
Fetch all Mail from an IMAP server with Postfix to distribute on local IMAP server
The situation:
The constellation: We have a managed, dedicated server from a professional provider. We currently have Tobit David.fx server in use within our local network which fetches all E-Mails ...
1
vote
1answer
672 views
Microsoft Exchange Server - Fails to receive e-mail from 'yahoo.com' - HELO Vs EHLO
All e-mail sent from a yahoo.com server to my domain fails to be correctly received. The difference between yahoo.com and other domains is that they open with HELO rather than EHLO and therefore ...
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0answers
36 views
postfix adding garbage characters in the mail
For my integration mail tests I am using Postfix as my SMTP server. My application is sending base64 encoded mail and when I receive it, looks like postfix is adding some random charters int the mail. ...
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1answer
74 views
Can't send mail through ssl with my virtual domains from an external webmail
I having issues with postfix to send mail through SSL from an external webmail.
I have several domain setup on my server configured in postfix with mysql. When I send mail with my main domain ...
0
votes
2answers
100 views
Sending emails using IIS 6.0 SMTP service without using a relay
I am running Windows server 2008 R2 Enterprise with IIS 7.5 & 6.0 and the SMTP service enabled. Following this guide, the SMTP service was installed and configured to relay outbound emails via my ...
4
votes
6answers
15k views
IIS/SMTP - emails are stuck in mailroot/Queue
I'm trying to send e-mails via SMTP within the IIS pickup directory. Unfortunately the e-mails are just going into the mailroot/queue folder and stay there. They never actually get sent.
Does ...
0
votes
0answers
150 views
Postfix SMTP-relay server against Gmail on CentOS 6.4
I'm currently trying to setup an SMTP-relay server to Gmail with Postfix on a CentOS 6.4 machine, so I can send e-mails from my PHP scripts.
I followed this tutorial but I get this error output when ...
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0answers
42 views
How to solve Client host rejected: cannot find your hostname when trying to send email
I'm getting this error, when trying to send messages to some email address. To gmail and hotmail, it sends.
SMTP<< 450 4.7.1 Client host rejected: cannot find your hostname,
How to solve ...
0
votes
1answer
235 views
Exchange 2010: Issues increasing maximum email size (smtp;550 5.3.4 SMTPSEND.OverAdvertisedSize)
I have a recently-deployed 1 server windows domain running Windows 2008 R2 Standard SP1 and Exchange 2010 SP3, running on the 2003 R2 domain and forest level. The server receives email through a main ...
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0answers
48 views
SMTP server stop sending emails
I am running a Java web application deployed on tomcat5.5 running CnetOS 5.9 to send emails to the users. the application sends the emails but after few hours the server stops sending emails, with the ...
0
votes
1answer
24 views
Internal SMTP server + Hosted E-mail possibiilty
We currently use a 3rd party hosted e-mail system using SMTP and IMAP. I was curious is there a way to setup an internal SMTP gateway or server that the internal client can connect through to ...
0
votes
2answers
51 views
SMTP server to smtp server forwarding?
we have one smtp server and we want incoming mail should store by smtp and forward two other smtp server is their any solution
we dont want email forwarding
Ex mail@mail.com to amail@mail.com
...
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votes
1answer
42 views
why does my gmail say “undisclosed recipients” in this case when I send email [closed]
I follow this method to send email through my localhost postfix server to gmail...
http://workaround.org/ispmail/lenny/test-mail-through-telnet
but for some reason, gmail, says "undisclosed ...
0
votes
2answers
89 views
Thousands of port 25 connections
Tonight a few IP addresses made almost 2500 connections on port 25 of a mail server. 2500 is the max limit, and 50 or less simultaneous connections is normal. They did nothing once they made the ...
2
votes
1answer
115 views
Exchange 2010 - can't send to a specific domain - 421 connection dropped due to socket error
I've looked at a few of the existing SF questions/answers and so far can't find the same situation. It's not a TLS issue like I first thought, since the remote server isn't asking for TLS, and it ...
0
votes
1answer
60 views
Exim can't send emails out of my server, but can receive
I installed cpanel on a new server, so exim is included. As my provider blocks port 25, I added port 587 (according to the ISP recomendation), to the "Allow exim to listen on port " setting.
I can ...
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votes
1answer
67 views
Postfix rejects email addresses as unknown if injected via SMTP, but accepts them if injected via /usr/sbin/sendmail
I'm using Postfix together with Mailman to handle mailing lists on one of my servers. There is a delivery method defined in Postfix to handle incoming mail for mailing lists, "mailman". This delivery ...
0
votes
0answers
43 views
Send emails to anywhere from localhost, send emails only to local users from external
I am attempting, for the first time, to set up an email server. So far, I have postfix and dovecot running on my CentOS server (hosted at rackspace). It has 3 interfaces: localhost, internal network, ...
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votes
1answer
24 views
Special mailbox names
As far as I can see according to RFC 5321, there is only one reserved mailbox name: postmaster
Some time ago I saw a document containing one or two other special mailbox names (I think they were ...
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0answers
15 views
GNU mail and IMAP
I'm using mail on Ubuntu 12.04 with this version:
mail (GNU Mailutils 2.2)
And the following .mailrc:
set folder=imaps://theo@cc
set password-theo@cc="pp"
set record=+Sent
set from="Theo ...
0
votes
1answer
67 views
How to find which local process is sending spam on a Windows Server 2008 server
I am managing a Win Server 2008 system with a number of hosted web sites. Recently I found that something was sending spam through our SMTP server. The logs indicate that the connections were being ...
2
votes
1answer
38 views
Simple, forwarding-only MTA?
I have a domain and a server. I’d like to have some e-mail addresses on the domain and I’d like to forward them elsewhere. I’d love to avoid running a full-featured MTA on the server, since they’re ...
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votes
0answers
42 views
OpenDKIM can't determine message sender from MediaWiki pear mail
Iam using http://www.mediawiki.org/wiki/Manual:$wgSMTP to send Emails from my Wiki.
Apr 7 14:29:57 x postfix/smtpd[10763]: connect from <mailserver>[127.0.0.1]
Apr 7 14:29:57 x ...
-1
votes
1answer
23 views
Mails are not getting delivered
I am facing the below error while sending the mail to yahoo and I have configured policyd on my server.
relay=none, delay=150, delays=0.32/0.01/150/0, dsn=4.4.1, status=deferred (connect to ...
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votes
3answers
4k views
550 relay not permitted [closed]
We are using Fogbugz on our server to do customer support emails. Occasionally we get errors coming back when sending emails which say:
550 relay not permitted
This seems to happen at random ...
2
votes
1answer
605 views
How the Postmaster@domain address works
I'm very new to Exchange (in fact, an apprentice and studying it at the moment) and am wondering how the Postmaster@domain.com address works. An example:
A smarthost configured with one mailbox, ...
0
votes
1answer
56 views
SMTP / HELO and RBL black listing
We've been having many issues with our external IP address being put on RBL's and blacklisted.
We are using a 3rd party, hosted SMTP e-mail and we have two locations using it. Our TLD is ABC.com. ...
0
votes
2answers
60 views
Hundreds of messages being sent from my SMTP server
I'm having some issues with a mail server.
Every 5 minutes, I see a list of about a hundred lines like the following (taken from /var/log/maillog):
Mar 31 15:03:59 hostname postfix/qmgr[19856]: ...
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votes
1answer
78 views
My shared IP address is blacklisted. What's the quickest way of temporarily use another SMTP account with the same domain?
I manage a few shared hosting accounts for some customers in different hosting providers. One of the IPs of those accounts was blacklisted and my customer hasn't been able to send emails to Google ...
0
votes
1answer
103 views
postfix relayhost 'Recipient is not recognized. Relay access denied'
im trying to get webmin postfix to send emails through my smtp account with another email provider (in this case lavabit.com)
im getting the error
'Recipient is not recognized. Relay access ...
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votes
0answers
91 views
Setting up Smartermail SMTP Banner for multiple IP / hostnames
I use Smartermail Enterprise 10.7 and I wonder how to set SMTP banner for my server which has 5 different IPs, each has its own PTR point to different domain. what cause the SMTP banner only match ...
5
votes
5answers
958 views
Many ISP's is block port 25, how do I choose an alternative port?
I am building an application that will be acting as a combined MUA/MTA on different networks. However, many of the networks are with ISP's that block port 25 for SMTP. Therefore I would also like to ...
0
votes
1answer
52 views
Claws Mail SMTP issue; cannot send
I am abandoning Thunderbird after it has slowly become a terrible, terrible piece of software for me. I have gotten everything set up with Claws, except sending. There are no official forums for this ...
0
votes
0answers
55 views
Exchange 2013 recipient filtering - reject after RCPT TO
According to this forum thread, exchange 2013 has a new behaviour for recipient filtering. Apparently, mails to unknown users are only rejected after the DATA-Phase, not after RCPT TO as this was the ...
1
vote
3answers
2k views
SSMTP with Gmail (Google Apps)
I want to set up my raid server here at home to use gmail's smtp and an email from my google apps to alert me if there is any issues.
I set up ssmtp, here is my config:
# Config file for sSMTP ...
-3
votes
1answer
31 views
Two servers mails [closed]
is that it is possible to have two mail servers in parallel, ie a primary through which mails are routed to the outside and a secondary for the exchange of mails locally. and the two servers are ...
0
votes
3answers
119 views
POP / IMAP server under attack : what risks and how to secure?
Since yesterday (7am), our POP server is under a dictionnary attack : this is what I found in /var/log/mail.log :
Mar 26 10:31:36 serv pop3d: LOGIN FAILED, user=monday, ip=[::ffff:91.121.**.***]
Mar ...
0
votes
1answer
25 views
Is it possible to configure Domino to redirect to a different smarthost based on subject-line triggers?
I'd like to configure Lotus Domino to redirect outbound mail to a different downstream SMTP relay if a certain keyword is present in the subject line.
Is this possible? If so, can someone ...
0
votes
1answer
70 views
Why does Exim's “sendmail” apparently do nothing for about 5 seconds before sending any mail?
I'm having a problem where calling "sendmail" results in it just sitting there for about 5 seconds before doing anything. I tried calling it with "-d" and this is the output:
# sendmail -d [My email] ...
0
votes
0answers
61 views
Best Practices for SMTP Relay with IIS? [closed]
Right now I have a few .NET web applications that utilize Sendgrid for SMTP email relay. I'm looking at building out some redundancy in my systems and was thinking about implementing this:
IIS App ...
0
votes
3answers
87 views
Is HTML content permitted in email header values?
In the process of troubleshooting an email message display issue, I noticed that an email header contained HTML.
Example:
From: <bob@foo.com>
To: <john@foo2.com>
Date: 11 Feb 13 ...
0
votes
1answer
75 views
How do I Reject all SMTP traffic except from a specified IP Block using DD-WRT?
I am running DD-WRT v24-sp2 std firmware on a Linksys WRT54GL.
I have a port forward configured on port 25 to ip 10.10.10.1. What I want to do is allow this port forwarding, but only from WAN IP's in ...
0
votes
1answer
97 views
Google Apps + Mailgun Split Delivery
We currently use Google Apps for receiving emails on our domain. We would like to send all mail to unknown addresses to our Mailgun server for further processing. This seems like a typical "split ...
0
votes
1answer
218 views
Postfix Relay: An Entire Domain
Goal: Need to forward all mail destined for users @ domainA.com to users @ domainB.com.
Using GApps for domainB.com. I setup a postfix relay that domainA.com's MX records point too. Able to send ...
-1
votes
1answer
77 views
Send 6000 emails at once [closed]
I am trying to help a local community group set up an email list. They cant afford to pay any extra money to rent an smtp server.
The email list is around 6,000 addresses. We dont want it to be ...
