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

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postfix mails stuck in mailqueue

I ran into a problem, I'm trying to set up postfix mail server (I'm using webmin), everything seems to work fine, I successfully connected outlook to POP3/SMTP, but as soon as I send an email, it gets ...
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1answer
12 views

OSX Server - Logging POP Mail Connections

I am trying to keep a running record of the users that are accessing our OSX 10.6.8 Mail Server using POP instead of IMAP. The Server Admin application features a running list of Mail connections ...
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0answers
38 views

pop3 mail proxy on linux server

I have an ISP pop3 account and I need to retrieve mails on my server (ubuntu server) to feed an IMAP webmail (roundcube) installed on my server too. So, I need : my_ISP_POP3server -> ...
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1answer
25 views

What happens if you have one imap client and one pop client?

I have a mailbox on my server which accepts POP and IMAP connections. If I connect one remote client via POP and another remote client via IMAP, what will happen? Will the emails remain on the ...
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2answers
62 views

Prevent using cleartext passwords in e-mail protocols? [closed]

Checking an older laptop in my possession, I found that all of the POP accounts set up on that device, were sending passwords in clear text when Sending and Receiving (Found this with the assistance ...
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1answer
115 views

Postfix/Dovecot Email Server (on Raspberry Pi) - Unable to configure POP3S connection with Gmail

I've been trying to configure my Raspberry Pi (Raspbian Jessie Lite) as a postfix/dovecot email server for my domain dominicgkerr.co.uk. Using a combination of the fantastic walkthroughs written by ...
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1answer
39 views

Use two different mail servers for a single domain [closed]

sorry for my english, I have used Google Translate. I have a Arsys host (an ISP host from Spain), which gives me 50 email accounts with 6GB of storage each. I have about 6 accounts of those who need ...
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2answers
32 views

Using POP3 and IMAP for same account

When using a mailserver I know that IMAP leaves all the mail in the server while pop3 downloads it and deletes it (sometimes after a few days, depending on the mail client configuration options). My ...
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1answer
124 views

Telnet test pop3

I have problem with using POP3 to recieve e-mail from my VPS. In Mail app I'm getting message, that connection failed and I should check login and e-mail anyway, it's good. I try to check it via ...
14
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1answer
2k views

Security risk of POP before SMTP

I received an email from one of our servers this morning (CentOS, with WHM running LAMP) stating: The server has POP3 before SMTP enabled. For security reasons, cPanel highly recommends that ...
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1answer
192 views

Sonicwall Block all internet traffic but email

I set up a sonicwall to block internet to users on a certain switch port. Works well, but now they want to access email, while still blocking the internet. I can't figure out a way to do this using ...
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1answer
45 views

How can I configure multi domain IMAPS POPS and SMTPs with single SSL Certificate

If I have 3 domains hosted on single linux based mail server that are domain1.com, domain2.com and domain3.com.and I have *.domain1.com signed ssl certificate. Is there way I can use the same single ...
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1answer
555 views

DNS Setting for POP3 and SMTP email [closed]

I'm new to server configuration, I have used rented webservers a lot, but I tried venturing myself with a VPS to run my own web/email server. All is good, I installed VestaCP to help me with dealing ...
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1answer
115 views

How I can parse email to get original recipient of an email? [closed]

I had email source with me and want parse original recipient of email. Lets say "user1@example.com" is receiving a email, but in "To" list user1@example.com, user2@example.com & user3@example.com ...
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2answers
72 views

Mail Server for a subdomain on a different Server?

I'm currently assigned the administration of a server that is accessed through a subdomain of another (not administrating example.com but y.example.com), and assigned to implement a web application on ...
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votes
1answer
62 views

Transfer existing email to new postfix/dovecot server via POP3

I have to build a new email server with dovecot/postfix on CentOS because an existing supplier is becoming too erratic with their billing. I can do that but I am worried for a small problem. If I ...
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1answer
2k views

Hmailserver and Outlook 2013 can send but not receive any emails in POP3 or IMAP

I'm having problems receiving any email from outlook. I can send email through smtp using comcast (my isp) without a problem, but I can't receive any email using either personal pop3 configured in ...
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0answers
63 views

Proxy/Gateway/Router server for specific ports only

Sorry, i don't know the correct term for this type of server. English is not my primary language. This is what i want to do : I am migrating my already running web app to Google compute engine (My ...
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1answer
1k views

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 ...
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1answer
134 views

How to check if clients connect to IMAP/POP via TLS or SSL?

I am willing to disable SSL on my dovecot servers (Debian GNU/Linux), leaving TLS as the only option. Before doing so, I would like to know who is still connecting via SSL with older or misconfigured ...
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2answers
507 views

Can't send email on Windows Server 2008 with Mailenable

I've got a VPS running on Windows Server 2008 and I'm using Mailenable as an Email Server for POP3 and SMTP. I've had the VPS since January 2015, its my first time configuring a server by myself, but ...
2
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0answers
711 views

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. ...
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1answer
405 views

Postfix POP3 NOQUEUE: reject: RCPT error

I am getting an NOQUEUE: reject: RCPT error when trying to send mail via POP3 and Postfix (note: IMAP works fine). Feb 21 06:57:04 r2d2 dovecot: pop3(br@telecomm.com): Disconnected: Logged out top=0/...
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0answers
22 views

Mailings to specific email provider causing popstate corruption?

We send out a weekly mailing to several thousand subscribers using an old version of Lyris ListManager, and have done so for years without incident. Every month or so starting about a year ago, two ...
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1answer
101 views

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 (...
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0answers
63 views

the delivery report includes the original letter

We have installed windows server 2008 R2 Enterprise and Microsoft Exchange 2010. The clients use Outlook from Microsoft Office 2010. if we use POP3 protocol between exchange and user then the delivery ...
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3answers
279 views

Transitioning from a POP only email account to new IMAP enabled account - how can subsequent emails to the old POP only email be supported?

I have just started working for a growing small business. I am the first person they've had with any real technology background and from this point onward I will be organising and managing any IT ...
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1answer
477 views

Courier-IMAP pop3d auth over mysql

I've got a task of migrating one mail server from one box to another and so far I have configured Postfix and it's working. But, Courier pop3d server fails without exception. So, I have Courier pop3d ...
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1answer
102 views

How to find old email accounts in imap? [closed]

I have a webmail with 90.000 imap accounts I'm trying to delete old email accounts (for example : accounts that has not been used for 1 year) this link may help to best answer: http://www.dovecot.org/...
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1answer
169 views

What happens inbetween SMTP and POP3?

I understand SMTP, and to a lesser degree POP3, but I feel like I'm missing a large chunk inbetween. I see this image on a Microsoft page: and I feel like what I'm missing is the "Internet" part. ...
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2answers
101 views

Simplest Way to Setup Email for Various Domains

I'm beginning to use Mandrill to send out transactional emails from my various domains. Now what I'd like is a way to receive these emails simply w/out setting up a mail server on my linux boxes. I'm ...
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1answer
65 views

Exchange 2010 - is it possible to have a separate password for POP3 access?

basically I want to see all my work emails in my google account. We used to have forwarding to google - but google started to reject our mail recently claiming it's spam. So i'm thinking about making ...
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1answer
310 views

Dovecot + OpenLDAP

I am trying to get dovecot 2.0.19 authenticate users via LDAP (OpenLDAP 2.4.28) and using Wireshark to debug the process. It looks like the basic configuration of dovecot is fine, but it doesn't pull ...
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1answer
135 views

Dovecot removing my mails

Why is dovecot removing my mails? I have setup an SQL database according to the Dovecot information, but I get this in my logs: May 14 14:23:53 alpha postfix/smtpd[16436]: Anonymous TLS connection ...
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1answer
2k views

Hybrid exchange and POP3 setup - some POP3 mailboxes and some exchange mailboxes

I'm looking to move some mailboxes to the Office365 exchange plan, however I also need to keep existing POP3 accounts. Option 1: Is there a best practise for this setup? Do you simply allow Office365 ...
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1answer
975 views

Using IIS smtp for incoming and outgoing and use hMailserver for mail accounts

I have installed hMailServer in one machine and IIS STMP in another machine. Even though hMailSever itself is a SMTP server. I can't avoid this because the IIS SMTP server has some hooks which which ...
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1answer
366 views

SBS 2003; Exchange 2003 can't receive mails without SMTP connection but without POP3 connector [closed]

i hope you can help. I'm losing my mind. I'm not a specialist in SBS but i have a huge problem. I wanted to replace the mircosoft pop3-connector with popcon because i was told that several mails ...
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1answer
4k views

Exchange: use Port 110 for both POP3 & POP3/SSL?

On our Exchange 2010 POP3 is configured to only allow secure logon (TLS connection for authentification). Now, the default port for "plain" POP3 is 110, and for POP3 with SSL is 995, hence with the ...
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1answer
102 views

Sendmail dropping domain name from the username

I'm setting up Dovecot with Sendmail and I almost have it working (I think). The username for the account is a full email address such as "username@domain.com". What seems to be happening is that ...
0
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3answers
2k views

SMTP sent E-mail not copied to Sent Folder [closed]

I discovered that some (few) providers don't copy into the Sent folder those E-mails which are sent from mail clients through SMTP. They only copy them to the sent folder if you send them from their ...
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1answer
2k views

Setup pop3 mailboxes in on Windows Server 2012 datacenter

a complete beginner question but I cannot find an answer with Google: Where do I setup email accounts / POP3 mailboxes on Windows Server 2012? I setup smtp service and can send emails from the server ...
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1answer
125 views

external pop email relay

I want to offer to my customer this possibility : get her pop3 emails from external pop3 server forward the news emails to the new external pop3 server I have find lot of tools for sync imap ...
0
votes
1answer
707 views

SBS 2011 POP3 Connector tries to pick-up non-existing e-mails

Windows Server SBS 2011, running Exchange Server 2010: Our client has their own Exchange e-mail accounts, but also some old POP3 accounts which are hosted somewhere else but are still in use. So we ...
2
votes
1answer
1k views

Looking for Script to change SMTP server address for office 2010

We have a pop3 email system. So we send our email out to a third party to do the scanning and filtering for us. We are switching companies to a new company at the end of the month. I need to change ...
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1answer
73 views

roaming Exchange/Outlook users also need POP3 accounts

I have 10 Win SBS 2008 User Accounts and 10 PC's. Three of the persons who are associated to the user accounts work at different PC's each day. These three people also do have POP3-Emails which have ...
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1answer
9k views

Configuring POP3 access on Exchange 2013

I'm trying to setup POP3 access on our Exchange 2013 server. As of right now I've enabled both the POP3/POP3 backend. Both services are running. I've also enabled PlainTextLogin. I'm able to telnet to ...
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1answer
44 views

Connect to old mailaccount after domain transfer

A few days agoo we successfully launched a new website for a new client. The client had allready a simple wordpress site hosted on one.com, so we had to request a domain transfer. After the transfer,...
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1answer
259 views

Dovecot POP3 username - does it require the @ symbol?

I'm having some mail issues which I'm trying to resolve. When I connect to my mail server using telnet should I supply my username like this: USER name or USER name@domain.com or doesn't it ...
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2answers
95 views

High performance POP3 solution that can handle a few accounts with millions of emails

Due to regulations we have to create a solution that communicates over smtp/pop3 (basically RPC over SMTP/POP3) only. Messages are sent from one application with SMTP, delivered to a mailbox, and ...
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1answer
507 views

Dovecot error: “Message ordering changed unexpectedly” after migration from courier

I have been setting up a new mail server and copied our client's old mail to it. The old server has Courier (under Plesk), we're using Dovecot on the new server. Most accounts seem to work fine (...