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I've setup PostFix on my server, and it's sending and receiving properly. I would like, however, to be able to use the PostFix server running on my box as an SMTP server, as in, I want to connect to my server and PostFix account within Gmail, so that I can send emails from my server from other locations.
The only reason I highlighted that point so much is because after a lot of searching all I can find is how to setup PostFix to access other SMTP servers, and that's not what I want.
There are three different programs (or processes) involved in the transactions you are describing:
Mail Transport Agents (MTA's) like PostFix or Sendmail, which relay mail to each other and then drop it into a mailbox (typically /var/spool/mail) at the last hop.
Client programs (like Gmail or Thunderbird) which pickup mail from the mailbox and present it to the end-user. These clients typically use the IMAP protocol to retrieve the mail from a mailbox.
And finally, an IMAP server (often Dovecot) which accepts IMAP requests and reaches into the mailbox created by Postfix to return mail to a user.
So you need to install Dovecot (or some other similar program) on your machine to accept requests from Gmail for your account. Dovecot and PostFix will work with each other to properly transfer mail from the relays to your account mailbox.
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Is there anyway to send an email to an external smtp server?
my smtp server is XXX.XXX.XXX.66, listening on port 25
Is there a single command to send an email to this server a on port 25 without any setting up any cfg files?
When googling, the different commands like mailx or sendmail have very complicated parameters and many that i dont require like ssl etc.
If you are referring to sending email from within the database, you can
set database parameter "smtp_out_server" to "XXX.XXX.XXX.66:25"
then use the UTL_MAIL package to send emails
That is probably the quickest and easiest way to send simple emails.
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Closed 1 year ago.
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Gmail shows a red banner above email messages sent by my web store.
This message seems dangerous
Many people marked similar messages as phishing scams, so this might contain unsafe content. Avoid clicking links, downloading attachments or replying with personal information.
I just registered a new domain on .software domain and using AWS SES for dispatching email. Before I sent same emails from .com domails and it was fine.
What can I do to whitelist my domain?
'DKIM', _dmarc. , v=spf1 include: are set.
Problem solved.
This is how it was before, screenshot is taken from gmail:
You see, mailed by was a default amazon service instead of my custom .software domain.
MAIL FROM Domain can be set on SES, it is not new.
But my problem was that I had not only domains registered, but also email addresses in my Identity management, and when you register your email address separate from your domain you need to specify MAIL FROM Domain on your email address again.
Mail from domain that is set for Email address has a higher priority than a Mail from domain that is set for entire domain.
I dont think the problem is the sender domain or the IP. The issue can be the content as well. Google will only show this when their system has reported people clicking on the "phishing" option. In your case, I assume its the .software domain, coz this tents to show that there is a zip or attached software, or clicked to a software that downloads, and might contain malware.
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Closed 8 years ago.
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One doubt I have is since in my old project whenever we used to write shell scripts on thee server, we just used various mail utilities of linux (sendmail, mail). We never configured any SMTP.
Suppose I have a new server with all these utilities installed, should I worry about configuring smtp?
Usually you can use typical cli utilities without any configuration required, provided you have sendmail installed (or something compatible) and your network configuration is ok. That is because the responsible server the utility has to use to send the email can be retrieved via DNS lookup.
This is different however if you want to use an outgoing smtp server, then you have to configure which one and how it can be used. This makes a lot of sense, since it allows more fine grained control and can prevent certain unwanted message details getting accepted like for example an invalid sender address. Also it can help improve the acceptance of your message by remote smtp servers which might not always work when your network setup is non-trivial.
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Closed 8 years ago.
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Is there a maximum of emails that can be received per day for a Gmail account? And if there is - what is it? Is something like 500 000 or more incoming emails possible?
86,400 max limit
Here are best practices to avoid reaching the storage limit:
Send message logs and automated emails to Google Groups. Using Groups, you can use a web interface to read very large or frequently mailed announcements that quickly hit the receiving limits of your email account.
Avoid using a single account for multiple users, and use Google Groups for sharing mail. Map 10 or fewer email aliases per account. Use groups to create shared mailboxes or to allow many people to send and receive mail with a single address.
Subscribe to the daily digest forms of heavily trafficked email lists.
Avoid using catch-all accounts. Spammers often try to guess email addresses in your domain. When they guess incorrectly, the spam is delivered to the catch-all address. The high mail volume can quickly exceed the Gmail receiving limits.
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Closed 9 years ago.
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I have installed sendmail on my webserver. Sending and receiving emails does work, but when I use authentication on port 25 ( to avoid spam attacks), I can't receive emails anymore.
All I get is an authentication error.
Is there a way to deactivate authentication in sendmail for incoming mail?
Edit 1 : In my sendmail configuration I have this lines:
DAEMON_OPTIONS(Name=ESMTP,Port=465,Modifiers=a')
DAEMON_OPTIONS(Name=STARTTLS,Port=587,Modifiers=a')
DAEMON_OPTIONS(`Name=SMTP,Modifiers=a')
You can not force authentication on port SMTP (25) if you want to receive messages from "strangers" (other SMTP hosts worldwide).
You should require authentication on SMTPS (465) and MSA (587) ports.
You may reject connection from DUL (dynamically allocated) IP addresses for unauthenticated connections and addresses listed by other DNSBL lists. Use FEATURE(enhdnsbl,...) with some DNSBL listing DUL ranges and FEATURE(delay_checks,...).
BTW You have missed s Modifier for SMTPS.
DAEMON_OPTIONS(`Name=SMTPS,Port=465,Modifiers=sa')