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Questions tagged [pop3]

POP3 stands for Post Office Protocol used by e-mail clients to retrieve messages from a remote e-mail server.

As well as being supported by local e-mail clients POP3 is also supported by most webmail services such as Hotmail, Gmail and Yahoo! Mail.

POP3 is just one communications protocol on the web. Others include:

  • Transmission Control Protocol (TCP)
  • User Datagram Protocol (UDP)
  • Internet Control Message Protocol (ICMP)
  • Hypertext Transfer Protocol (HTTP)
  • File Transfer Protocol (FTP)
  • Internet Message Access Protocol (IMAP)

POP3 on Wikipedia

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How do the servers mark the email as read

I'm looking to know how servers mark emails as read and unread with IMAP or POP. I've logged into my server (using cPanel) and navigated to my mail directory and downloaded the same email file, both read and unread, and used a file comparator on…
CIRCLE
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dovecot userdb passwd-file default_fields uid not expanding %variable

I'm trying to set up a very simple shared mail server, where each 'domain' is a system user, i.e. 'example.com' is a real user with /home/example.com/, a uid of 5001 and gid 'example.com' of 5001. Each domain\user has their own maildir inside their…
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transferring mail hosts clients having to redownload all mail

im transferring mailboxes from godaddy over to opensrs. When clients connect to their mailbox after it has been transferred they are having to re-download all their old mail to their mail client (outlook, thunderbird, etc..) Is there a way I can log…
Techlands
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Need a POP3 or IMAP relay or adapter from an exchange server, any ideas?

Short version of the issue We have a 3rd party workflow tool that needs to check e-mail inboxes. The tool only supports checking e-mail with pop3 or IMAP Our network guys don't allow pop3 or IMAP access to our exchange server. My working solution…
JohnFx
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What is the best way to setup redundant pop servers?

I am in charge of setting up our company email infrastructure and have a question on how to setup redundant pop/IMAP servers. I understand that I can setup failover for inbound email using MX records but how do you setup the same type of thing for…
thiesdiggity
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nginx as smtp proxy

I was ordered to configure nginx as SMTP proxy. That's all details I have. I've looked though some books and docs and don't see neither any examples of such configuration nor explanations of why this might be useful. Probably, to handle SMTP AUTH…
Andrew
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Redirect smtp, imap and pop to ssl

I want my users to stop accessing user accounts like IMAP, SMTP and POP without SSL. I can easily disable non-SSL access, but then everything would break. Is there a way to automatically redirect them? With HTTP it's easy, but with this...? I mean,…
Halfgaar
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How can I forward to a specific MTA based on email address?

How can I forward incoming messages to a specific MTA based on the username portion of the recipient's email address? I would prefer linux-based software, but Windows would work too. Background: Our organization is transitioning from ISP-hosted POP3…
Nic
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Serve IMAP Account as POP

I have ran into this a few times: I get a new email address that can only be accessed by IMAP or through a web browser. I want to read mail from all of my other accounts through my gmail account. Gmail lets me connect to other pop servers out in the…
Ronnie Overby
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Get new mails immediately

Up to now we get new mails with the tool getmail. It works well. There is a cron job which runs every minute. Is there a way to get the mail faster? I see two ways: Solution 1: run the cron job every 30 seconds Solution 2: maybe use IMAP idle. I…
guettli
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Recommendations for a POP3 Connector for Exchange 2007

I am upgrading to Exchange Server 2007, and realise that Microsoft does not ship a POP3 connector with 2007. There appears to be several commercial offerings (MAPILab, POPcon, Exchange Connector) Do you have any recommendations/warnings about these…
Spongeboy
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HAProxy - IMAP, SMTP, POP3 - Multiple Servers

Please accept my apologies if this is off topic or does not apply on a more broad scale (i've searched the internet and can't seem to find a solution anywhere). I'm not sure if this is even possible, if you have any suggestions that will work better…
PunkIsDaFunk
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Docker Mailcow: Nginx as Mail reverse proxy to docker container images using SMTP, POP3 and IMAP

On my server I am running a mailcow:dockerized solution on a debian server and I want to use the nginx not only as an http reverse proxy but also as an SMTP imap and pop3 too as seen in https://www.nginx.com/resources/admin-guide/mail-proxy/ But the…
Dimitrios Desyllas
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Nginx + mail open ports vulnerability

I'm just thinking out loud here and wondered if i have to open up ports (inbound) to still use my mail. Isn't it possible to redirect trafic lets say imap or pop3 through a subdomain (imap.domain.tld or pop3.domain.tld) hosted at port 80 or 443 and…
Baklap4
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POP3 and IMAP: Setup Gmail & Zoho

I wish to use Gmail to handle all of my email needs. Sending, reading, deleting, moving, forwarding etc.. I have a domain with an email at Zoho user@mydomain.com, this is working well. I've always been confused with POP3 and IMAP regarding which…
Karl Morrison
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