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

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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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3answers
3k views

Disable user_deny.db in Cyrus/imapd

We have a cyrus 2.4.12 on Debian, we use packages, rather than building each software ourselves. I am getting the this "log" constantly, a lot of, various users, and 8-10 times per user request: ...
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1answer
11 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
10 views

POP3 conflict with Microsoft

we have mail server using pop3 protocol placed at China,in Egypt when we trying to add an account with microsoft outlook 2010 and 2013 versions this error occured !! i contaced our ISP to find out ...
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0answers
23 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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2answers
455 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 ...
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1answer
24 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
57 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
90 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 ...
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
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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2answers
4k views

SBS2011 - exchange 2010 - NEw mailbox accounts not showing in list of pop3 connector

I have migrated a SBS2003 --> SBS2011 and configured the pop3 connector for all the migrated mailboxes, which works fine. But when I create any new accounts, they are not listed as available accounts ...
-1
votes
1answer
105 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 ...
4
votes
3answers
816 views

Security Risk involved in disabling SMTP authentication on POP3 Server?

I provide IT Services to a client who, for the longest time in the world, has been using a POP3 server from Network Solutions to handle their email. At this time, I'm introducing the McAfee SaaS ...
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2answers
321 views

POP mail to Exchange online Migration

At work we want to migrate to Exchange online from our current setup of using rackspace hosted POP email. We have about 50 people planned for migration and want to minimize email downtime for them as ...
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1answer
145 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
42 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
420 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
102 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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votes
1answer
60 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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2answers
63 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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1answer
8k 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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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 ...
2
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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
125 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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1answer
1k views

Can I force dovecot to ignore pop3 requests to delete received email?

this is my first SF question, so please be gentile: Is there an easy way to force dovecot pop3 server to ignore "delete messages" commands after being fetched by the MUA? Here are the issues I'm ...
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1answer
1k views

POP server for default email client on ISPConfig [closed]

I have ISPConfig3 server , where SquirrelMail mail is already configured i have. I am able to login to my email account https://www.mydomain:8080/webmail/src/webmail.php. I want to configure this ...
2
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0answers
669 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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votes
1answer
371 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 ...
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2answers
775 views

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 ...
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0answers
21 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 ...
3
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1answer
96 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
59 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
242 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 ...
1
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1answer
455 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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votes
1answer
3k views

Mail server: can't connect via POP/IMAP

I've followed this guide on setting up a mail server on my dedicated server. I've been able to send mails from the php application I'm using and the linux commandline (using telnet, php, etc). The ...
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1answer
97 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: ...
3
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0answers
6k views

nginx as smtp proxy [closed]

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 ...
1
vote
1answer
166 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. ...
1
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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 ...
1
vote
1answer
903 views

Recover hard deleted items from Exchange

My MD had a clear out of her mailbox (anything from september 2011 back to 2005 was deleted!) she is now majorly regretting this as there was contracts etc etc in there. Now I have looked in OWA but ...
2
votes
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 ...
1
vote
1answer
302 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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votes
1answer
130 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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vote
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 ...
0
votes
1answer
920 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 ...
-1
votes
1answer
243 views

ehcp - access pop3 account

I finally manage to get mail working with ehcp on an ubuntu server. I can get and send email from the webmail, but I can't seems to be able to access the pop3. I can telnet to the pop3 (server?) but ...
-1
votes
1answer
358 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 ...
0
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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 ...