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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.

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26 views

Can't get emails into Outlook client

I have moved hMailServer onto a different server. When I use Outlook and log the communication within hMailServer I get the following; Creating session 737 ... SENT: +OK POP3 RECEIVED: CAPA .... SENT:...
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0answers
52 views

Can't set up POP3/SMTP mail on Windows 10

I am trying to set up a new Windows 10 machine, and am having problems with mail. I need to connect to an old server running POP3 and SMTP. The two programs that I can find that come with Windows 10 ...
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0answers
246 views

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, ...
0
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1answer
225 views

Can't login to IMAP/POP3 server external

I have installed Postfix, Dovecot and MySQL via this tutorial (https://www.linode.com/docs/email/postfix/troubleshooting-problems-with-postfix-dovecot-and-mysql/). When I do the following command, I ...
3
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2answers
249 views

Manage multiple account from just one

I'll like to know if there is a way to manage multiple email account just from one. I have about 40 or 50 external POP3 email accounts, is there a way to forward all entry emails from those accounts ...
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1answer
671 views

Login Fail for IMAP on Exchange Server 2016

I have deployed Exchange Server 2016. I am able to send email over 587 while I face Login failure over IMAP 993 and POP3 995. Over Microsoft Tool https://testconnectivity.microsoft.com/ IMAP Test ...
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1answer
55 views

Security issues with SMTP

I am looking at SMTP and POP3 and am trying to find the security issues with both protocols, I have found that SMTP can be easily impersonated on port 25. However I am struggling to find security ...
0
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1answer
40 views

POP3 username including special characters

I need to access an Mailbox in Exchange Server 2016 via POP3. Unfortunately the username contains German special characters like 'ä' or 'ß'. POP3 service just gives an -ERR Protocol error. 17. Is ...
0
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1answer
576 views

Outlook 2016 applies Exchange attachment size limits to other POP3/IMAP account

In our organization, there is a 10MB limit on email attachment size (through Exchange 2013). Most of our clients have another POP3/IMAP account too (in Outlook, besides their Exchange account). The ...
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0answers
34 views

Mail recieve error pop3/ Network need refresh for receive company email in outlook

I am facing an issue. The issue is always need router restart in my company, because outlook error for receive E-mails for all PC'S at same time. until restart the main router the receiving keeps ...
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0answers
58 views

Gmail & GoDaddy - How to AMEND email settings?

I have no idea where else to turn to ask this! Stack Overflow admins sent me your way. I recently transfered a domain away from one host over to GoDaddy.com, and the person i did this for uses gmail ...
0
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2answers
91 views

Postfix with Maildir and popper as pop3 server

I am trying to run postfix with "maildir" feature and qpopper as pop3 server and I'm stuck. When I disable "Maildir" feature, popper is running fine, but I would like to make it work with MailDir. I ...
2
votes
1answer
119 views

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, ...
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0answers
36 views

disclaimer not working with pop3 configured clients (Exchange 2016)

i recently add a rule to add a disclaimer to all the out going messages (emails that goes out side the organization). if the email client is configured as exchange this works fine but most of the ...
1
vote
1answer
90 views

Can we, as a business, do anything about a PHPmailer spoofing hijack?

We use business email addresses from a private domain via pop3 on gmail, but our hosting company have started suspending us daily because one user's account has been hijacked by a phpmailer sending ...
0
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1answer
795 views

Dovecot “Address already in use” error

I've some problem with starting dovecot server. I get the following error: Failed to start Dovecot : Error: service(imap-login): listen(*, 143) failed: Address already in use Error: service(imap-...
0
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1answer
3k views

Haproxy Load Balance IMAP,POP3,SMTP: Unable to use proxy 'imap' with wrong mode, required: http, has: tcp

I try to reverse proxy all the incoming email traffic to a mailcow-dockerized solution in my debian server via haproxy: The haproxy.cfg configuration is: global log /dev/log local0 log /...
0
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1answer
1k views

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....
0
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1answer
152 views

POP3 Server: ERR Unsupported authentication type

I've installed Axigen Mail Server and enabled SMTP and POP3 servers. After that, I've created domain (slava.local) and an user (slava). So now I can connect to the SMTP server (using telnet, open ...
0
votes
1answer
299 views

Apache James TLS Woes

I am trying to set up a small email server using Apache James v2.3.2.1. My Java version for this installation is jre1.8.0_131. My server is running CentOS 6.9. I have the server running, but I ...
-1
votes
2answers
283 views

Can send test mail via Outlook, but cannot connect to Exchange Server with POP3

We are testing Exchange Server 2016 mail server. We can connect to user's mailbox via OWA (Outlook Web Access). When testing POP3 mail from Microsoft Outlook (on a non domain-joined PC) we can send ...
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0answers
104 views

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 ...
4
votes
3answers
2k views

Can I safely remove all mail services from CentOS?

I've inherited 3 legacy shared servers all running CentOS. We no longer offer any email subscriptions from our servers and have migrated everyone to cloud services. These servers host about 60 ...
1
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0answers
101 views

POP3 service is not ready even though the service is running, Telnet does not return POP3 OK status?

I am working on a Windows 2008 R2 server running Exchange 2010 and I am currently trying to troubleshoot a POP3 connectivity issue that is preventing some outside remote accounts from logging into the ...
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1answer
189 views

Does secondary or backup MX server deliver queued emails to users?

Suppose, I have a primary MX: mx1.abc.com with priority 5 and secondary mx as mx2.abc.com with Priority 10. I have independent IMAP/POP servers configured to fetch email for abc.com domain. (imap.abc....
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2answers
429 views

How does IMAP/POP Server fetch emails from my SMTP server?

I have a domain abc.com with MX record/SMTP server mx1.example.com. My IMAP/POP server (incoming server) is imap.example.com and pop3.example.com. How does my IMAP and POP server fetch emails from ...
0
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0answers
116 views

Does Exchange 2013 have a pop3 connector like SBS 2011 did?

I'm looking at installing a server with exchange 2013 loaded. I have however just noticed that the current server has SBS 2011 and is using a pop3 connector to retrieve email hosted elsewhere. I don't ...
0
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0answers
412 views

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 ...
0
votes
1answer
31 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 ...
1
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0answers
366 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 -> ...
-2
votes
1answer
50 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 ...
-1
votes
2answers
323 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 ...
0
votes
1answer
538 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 ...
0
votes
1answer
57 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 ...
1
vote
2answers
57 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 ...
-1
votes
1answer
782 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
votes
1answer
3k 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 ...
-1
votes
1answer
717 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 ...
-3
votes
1answer
99 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 ...
-1
votes
1answer
3k 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 ...
0
votes
1answer
403 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 ...
0
votes
2answers
253 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 ...
-1
votes
1answer
247 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 ...
1
vote
1answer
3k 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 ...
0
votes
0answers
79 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
votes
1answer
3k 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 ...
0
votes
1answer
384 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 ...
0
votes
2answers
948 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 ...
3
votes
0answers
2k 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. ...
-2
votes
1answer
641 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/...