Server Fault Stack Exchange
Server Fault Stack Exchange

Questions tagged [imap]

IMAP stands for Internet Message Access Protocol and is the other e-mail protocol along with POP.

E-mail clients using IMAP often leave messages on the server until the user deletes them. This allows multiple clients to manage the same mailbox - useful for support help desks for example.

IMAP 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)
  • Post Office Protocol (POP3)
  • File Transfer Protocol (FTP)

IMAP on Wikipedia

603 questions
-1
votes
1 answer

SPF Outlook Web App (OWA) undeliverable email

PROBLEM: Outlook.com web app (OWA), synchronized with my local server via IMAP and SMTP(STARTTLS), returns "Undeliverable message" for all messages sent. PROPOSAL: (rejected) This returning message points the issue comes up with the SPF and sugests…
Daniel Ramos
  • 1
  • 2
-1
votes
1 answer

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 get the following response: $ openssl s_client…
yesterday
  • 119
  • 1
  • 1
  • 4
-1
votes
1 answer

Exchange combined with another provider using imap

Given a mail infrastructure on a shared hosting environment using ~10 main email inboxes and ~30 email inboxes for other purposes, all via IMAP. We now want to migrate to Microsoft Exchange (using Exchange Online). We have to pay per inbox. This is…
David Vielhuber
  • 105
  • 4
-1
votes
1 answer

SRV Records not visible, can not receive E-Mails

I set up a debian 8.7 linux server with the IP 123...1 and I pointed bla.example.org at it. (www.)example.org points on another Server 123...2. Now I installed mailcow on this server and I am using the domain bla.example.org for it aswell (the…
Bernhard
  • 141
  • 1
  • 9
-1
votes
2 answers

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 test email but can not login to POP3 server. The…
SpiderlinK
  • 21
  • 1
  • 7
-1
votes
1 answer

How does mail work, setting up own server

I am going to set up my own mail server using open source MTA - Postfix. In general I understand how everything works, but I still cannot find out some things. Here is diagram I am using for understanding all this stuff MTA (Postifx in this case)…
CROSP
  • 191
  • 1
  • 1
  • 7
-1
votes
1 answer

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.com & pop3.abc.com) Suppose mx1.abc.com goes…
Anand Shrestha
  • 17
  • 3
-1
votes
2 answers

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 mx1.example.com ? Do IMAP/POP Server use any…
Anand Shrestha
  • 17
  • 3
-1
votes
1 answer

Does anything changes for a client in the API communication after the command STARTTLS is sent and a response received

I'm trying to understand how the command STARTTLS in IMAP works exactly and what becomes different when it's sent. After I've sent the command "STARTTLS" before login process and received the response "OK Begin TLS negotiation now" as a client, does…
Johshi
  • 113
  • 1
  • 5
-1
votes
3 answers

What's is the best way to migrate dovecot imap accounts to office365

i need migrate some accounts from dovecot imap service (how cpanel setup) to office365. This accounts should be of diferent licences businnes and kiosk. Is this possible? Any suggestes? Somebody has experience in this migration type?
Nicolas Gliksberg
  • 11
  • 3
-1
votes
2 answers

Port decisions for email setup in 2016 (Ubuntu)

I have a new Ubuntu 14.04 LAMP server with the UFW firewall setup on DigitalOcean. My goal is to add email for use on my phone(iPhone) and laptop(via Roundcube). There is a lot of old information floating around about what you need to do to setup…
Josh
  • 93
  • 1
  • 6
-1
votes
1 answer

Best Practice for Mailbox Backup (IMAP)? With Webinterface?

Situation: Debian Mailserver with ISPconfig3, Postfix and Dovecot, about 500 Users with different Domains. Server is a virtual client, so i backup it via XenBackup. Problem: If a user delete a single email, i don't want to restore the whole server…
fidolino
  • 1
  • 1
  • 1
-1
votes
1 answer

Moving clients from Outlook Express/POP3 to Outlook/IMAP or Exchange

I have a client that is still running outlook express with XP and on POP3 based e-mail. I've not played with Exchange or IMAP much but would it be possible to import all their addresses, folders, and emails from OE to a more modern email protocol?…
Jason
  • 3,931
  • 19
  • 66
  • 107
-1
votes
1 answer

Postfix virtual domains and Cyrus for imap

I am setting up a email server on a centos box where I am using the virtual(8) delivery agent within postfix so that I dont need to create a unix user for each email address, and I have set up Cyrus with sasl auth to handle imap. essentially I have…
user220242
  • 7
  • 2
-1
votes
1 answer

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 established from…
www.data-blogger.com
  • 201
  • 1
  • 3
  • 10
1 2 3
…
40 41