Questions tagged [smtp]
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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Reverse DNS - how to correctly configure for SMTP delivery
I started a new service and we need to send emails to our customers (new account confirms, etc).
My server is known as prod01.bidrodeo.com and resolves to 97.107.134.38 .
For reverse DNS, 97.107....
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How to correct Postfix' 'Relay Access Denied'?
This morning, in order to correct a problem with a name mismatch in the security certificate, I followed the recommended steps from How to fix mail server SSL?, but now, when attempting to send an ...
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What's the difference between postfix/smtp and postfix/smtpd
A bit confused when reading through the logs of my smtp/mail server, I'm turning this questions to you guys.
In the maillog files I'm seeing entries for postfix/smtp as well as postfix/smtpd. I can ...
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mail loops back to myself | postfix
Hi I have an issue with bounced mail it does not happen all the time but at the same time is very frequent. Most of the time if I send an email to an address that does not exist then i get a bounce ...
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postfix multiple IP SMTP banner
I've installed postfix 2.11.3 and we have multiple IP addresses on our server which we want to host two domains, isolated and running on their own IPs.
domain1 unix - - n - - ...
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postfix fails to send mail with "fatal: unknown service: smtp/tcp"
I have installed postfix, and when I tried to send a mail to gmail it told me that it has been sent, but when I checked my inbox in Gmail I didn't saw it.
This is how the connection looked like:
$ ...
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SMTP 25 closed even though I allow everything in firewall (Debian server running sendmail)
I am running sendmail + dovecot in my Debian server. I have enabled the firewall rules to allow everything:
iptables -P INPUT ACCEPT
iptables -P OUTPUT ACCEPT
iptables -P FORWARD ACCEPT
...
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Email server configuration still complaining the connection isn't secure
This is a follow up to another question I had, but its quite different so I thought I'd start a new post.
Emails bouncing - 454 TLS not available due to temporary reason
I'm trying to work out why I ...
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ISP blocking port 25
My ISP has started blocking port 25 so I can not send email through my dedicated server any more.
I have several options:
Send email through the SMTP server provided by my ISP. Any problems with ...
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When exim4 sends HELO/EHLO, how do I configure which host name it sends?
Mails from my system are being rejected when the receiving server does HELO checking. I believe my system is sending the wrong domain name. I'm running exim4. Googling for anything about exim4 and ...
user10066
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How does a Reverse DNS lookup work with regards to spam filters?
I have heard that most spam filters use a reverse DNS lookup on the originating IP address of the sending SMTP server (or something like that) as part of the verification process. I want to make sure ...
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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 ...
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What ports to open for mail server?
I have just finished setting up a Postfix mail server on a linux (ubuntu) platform. I have it sending and receiving email and it is not an open relay. It also supports secure smtp and imap.
Now this ...
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Do SPF Records For Primary Domain apply to subdomains?
I have a quick question regarding SPF records: Do they need to be present for all subdomains?
Lets say that I have a TXT record with SPF info for domain.com
Let's also say that I have a seperate ...
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What replaces IIS SMTP server in Windows Server 2012
I have read the notes here http://technet.microsoft.com/en-us/library/hh831568.aspx regarding deprecated and removed features in Windows 2012 and it says that SMTP is deprecated. I assume this is ...
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