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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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Average mail quota usage: tricks to implement unlimited email quota

I suppose that hosters who provides unlimited mail quota are only claiming it unlimited, and hope that they won't run out of disk space. Correct me if I'm wrong. In order to do such trick they will have probably to calculate the average real quota…
Marco Demaio
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Outlook 2003 items stuck in outbox after sent (POP3)

I have a PC, when the user sends an item it's stuck in the outbox after sending. The strange thing is that the mails are being sent to the recepient. It's just that Outlook doesn't move it from Outbox to Sent Items...I checked all the settings and…
Saif Khan
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how to trace an outlook mail not arriving to its destination when is sent to another domain?

I have an domain account configured with Ipower.com. If I use an email client such as Evolution, the mails arrive as expected. However if I use Outlook 2007 (as everybody in this company) the mails only arrive if the destination belongs to the same…
Alex. S.
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SBS 2008 pop 3 connector won't download emails

We use pop accounts as a backup when our server or internet connection is down. We've recently upgraded to sbs 2008. I've added our backup pop accounts via the SBS console pop conenctor. When i hit retreive now it give me an error. in the event…
Charlie Bear
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Zimbra pop3 not accepting connections

We have a new Zimbra server (Release 5.0.18_GA_3011.UBUNTU8 UBUNTU8 FOSS edition) running and it was working great until we changed the host name following documented procedures. Now the server is not listening on port 110 anymore on the proper…
John Virgolino
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Mail server (Win2003) can't receive emails, why?

Everything is fine when checking with smtdiag.exe Everything works fine with telnet. Tried from outside, connect to mail server everything works fine also - this means no ports are blocked. The problem is that mail server is unable to recieve any…
bardan
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POP3 to POP3S proxy/gateway?

We have a very old (windows) software that is only capable of POP3 (without SSL). We cannot change it and we do still need to have it pulling down emails from several POP3 servers for some time. However, those servers slowly turn to SSL only…
I grok it
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Do all email servers offer POP / POP3?

I have always preferred POP over IMAP and am increasingly finding that the various mail services I use don't seem to offer it. I just don't need to save my sent mail remotely and prefer to delete mail on the server after a few weeks. I don't run any…
cardamom
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Why SMTP service should be started for email receiving?

Windows Server 2003, SP2. Configured both mail services POP3 and SMTP. And found, that when SMTP service is stopped, pop3 service doesnt receiving email messages... outlook express is configured to use local pop3 server and remote smtp service - so…
burli
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Sendmail SPF Check Fails When Receiving Emails from Our Domain in Gmail Client

I am using Sendmail to handle emails for my domain, which has properly configured SPF records. When I send emails to external addresses, everything works correctly and the SPF check passes without any issues. However, when I receive emails in the…
Mquinteiro
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Dovecot: mark messages loaded over POP3 as read

The task is to make messages delivered over POP3 marked as read while also keep them on server (even if DELE command issued by client) and accessible over IMAP. There are two exim config options: pop3_no_flag_updates = no - this enables setting…
Mikhail Karakulov
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Is Gmail removing "Received" in headers?

I added my professional email to my gmail account as POP3 and set it as default for sending emails. Strangely, when sending emails to other emails like hotmail, or even by using tools like mail-tester or mailgenius, for each of them I see in headers…
anthomaxcool
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How does Microsoft Exchange determine which mailbox database a mailbox is in upon authenticating via POP3?

Performing a Microsoft Exchange 2010 to 2016 migration and everything is ready for transition besides this one problem. I have an internal CNAME DNS record mail.domain.tld that is pointing to the Exchange 2010 server 192.168.0.10. The Exchange 2016…
qroberts
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does SSL/TLS STARTLS full encrypt connexion for POP and IMAP

I am configuring POP and IMAP accounts in thunderbird mail client. Here are 2 options: Security: None SSL/TLS STARTLS Authentication method: Normal password Encrypted password Kerberos / GSSAPI NTLM OAuth2 I have 2 mails accounts: One POP and…
Bob5421
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How to proxy IMAP/POP3 connection to appropriate backend mail server by domain

I have system with multiple email server (exchange, zimbra) for multiple domain. So when users of domain A want connect to server for getting email they have to use IP of server A (Ex: 192.168.10.253), same way with user of domain B, they have to…
Khoa Le Anh
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