Email Protocols

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Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.

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Am I wrong if understand "Archiving emails " in MS Outlook will reduce the .PST file by reducing its size?

If so, what is the real mechanism behind it actually?

Please help, wiZards. Many thanks in advance.
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Called number from blog at Yahoo to see what I was doing wrong.  I had followed the instructions to the letter.  Verified pw on separate computer.  Tech tells me he needs to add services to account so this will work.  THEN he tells me if cost $149.00 for him to do this.  AM I being scammed and if so is there a special way to make it work.
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We have a web application that uses the client email to send email 'from'. We want to add an SPF record on the client's DNS (text records) to allow this. I need to confirm the syntax before I do so.

v=spf1 a mx a:mail.domain.com mx:domain.com ip4:XX.XX.XXX.XX ~all

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"domain" being their domain name
XX.XX.XXX.XX being the IP of the server that hosts the web application

Please let me know if you think this looks correct or if any changes are needed.. Also what is the difference between mail.domain.com  and  domain.com
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Hi,

Had issues with ActiveSYnc timing out on Exchange 2010 SP2 RU4. Updated the server to SP3 RU17 on May 20th.
Only the activesync timeout problem for 3 Users existed prior to this update. These activesync issues remain for the three Users (not the focus of this question) and new issues are seen (focus of this question):

Total of 15 Users out of 250+ affected with this new problem. These Users are not the same with the ActiveSync issue:
1) For SOME Users all shared mailboxes in Outlook no longer populate with emails or auto-update immediately after the updates.
2) For SOME Users, this issue appeared to start a full week later.
3) For ONE User, only one of three shared mailboxes in Outlook are not auto-updating.
4) Selecting the folder in Outlook ,choosing the 'Send/ Receive' tab and selecting 'Download Headers' then 'Update Folder', allows the emails in these shared boxes to populate with new emails (since the last time this process was manually run).
5) Win7 Pro for all but two Users, who are on Win10.

What I have tried (not necessarily in this order):
1) New Outlook profiles
2) New Win7/ 10 User Profiles. Tried this because loading two of these Users' profiles onto a different, unused laptop works fine.
3) Deleting the .OSTs manually and rebuilding
4) Cached Mode/ Online Mode
5) Deleting the autodiscover xml record in the Outlook profile folder. Did this in case that file was corrupted and was not pulling the shared mailbox info properly.
6) Saw a …
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Hey Everyone,
 This started late last week all of the domains we host are unable to send out to AOL but we can receive aol email.
Ive checked all of our domains against blacklist as well as the server IP.

Any ideas on this ? I'm completely lost at this point and still waiting to hear back from AOL.  Is there anything I can check or do to rule things out?
Our mail service is server 2012 running smartermail.
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Greetings,
my not-for-profit has 20+ service-focused email accounts for different business needs. Right now I keep about 10 tabs open on my desktop to monitor incoming traffic and reply when needed. Is there an app/dashboard (like Hootsuite) which I could use to create dashboards to manage these Inboxes?

Thanks!
JohnD
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I have a domain a purchased through GoDaddy. I then am using HawkHost to send and receive emails. I changed the MX records accordingly.

For some reason, I can send messages but I can't receive them? Any idea what would cause this? Is there anything other than the MX records I should be changing on GoDaddy?

Also kinda strange... if I do the Outlook "Test Email" the message ends up coming through. That is the only message that makes it into the inbox.
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Dear Sir,

We have a software to send bulk emails to our clients which contains the course materials. When sending the bulk emails, there are lots of error/time-out which the destination mail server reject our emails. I've solved the problem for those @gmail.com by adding a record on our DNS server to proof we are not the spammer. But yahoo and hotmail not solved yet. Are they have this mechanism?

Thank you.

With regards,
Wataw
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how can I download all my gmails for offline viewing
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Is there such a list of IP or smtp domains (doesn't have to be up to the hour up-to-date) list so
that we can block at our smtp?

Blocking by firewalls is not good as the emails will still come in
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What's the easiest way to move from pop3 to imap on multiple devices?
Pretty sure the mac stuff (iphone, ipad & possibly mac book) are currently using imap, but the PC (desktop & laptop) is the one that makes me nervous. I can envision myself with hundreds, if not thousands of duplicate emails to sort through when its all said & done!
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I get an email in outlook 2016 through my pop mail server (if that matters), with the specific email I am looking at sent from gmail... but I think this is a generic question.

On the to line, along with my name, it might show 'steve smith'; 'bob jones'; etc.... the other people it was sent to, with each name in single quotes (this is a group mailing)

Each is a hyperlink - i can hover on a name and a little window pops up with the contact image (just the default outline), and the mail icon is clickable.  A down arrow brings up a bigger contact window with that person's email address.

My question - where is it getting all those person's names?  From the sender's contact list? or is it matching to my contact list? Don't think that's the case, 'cause I don't have some of those people.

and when I send an email, is it also picking up the person's name and including it along with their email?

If I was to have a contact for 'bob (what a butthead) smith'  with email bobsmith@gmail.com, when I type an email to bob smith, does he see that name I have for him!?

Is there a way to keep that from being sent? so he just sees it was sent to bobsmith@gmail.com?
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Hi Experts exchange.  I have an application that sends emails upon completing a arduous process.  Ie.. we have to create a permit and inspect it and what not for the email function to fire off from the application.  Our email functionality has been suspect and I was wondering if there was a quick and easy way to send an smtp request to our smtp server from a command line to quickly test functionality without having to create the permit and inspect it.
Does anyone know how to do this.
the server is windows 2012.

if someone could type the syntax or command, that would be awesome.

example variables you could use.   the sendto address is BigDoggy@gmail.com   the smtp server address is 192.168.1.100  the hostname of the server trying to send the email is bigsun with ip address 192.168.1.101

those are fictious settings above but just wanted to be able to tie logic to syntax.
Can someone help me out.
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regular gmail; not g-suite. one label.

gmail label

only want gmails to reach inbox from one sender
admin@ee.com

all the other emails are not important

is there a gmail filter using the word NOT
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If we have valid SSL cerfiticate for server/client authentication, is there any reason to have a TLS certificate?
Asking because I'm receiving the following event frequently in event viewer

"There is no valid SMTP Transport Layer Security (TLS) certificate for the FQDN of exchangecas.cfwebmasters.com. The existing certificate for that FQDN has expired. The continued use of that FQDN will cause mail flow problems. A new certificate that contains the FQDN of exchangecas.cfwebmasters.com should be installed on this server as soon as possible. You can create a new certificate by using the New-ExchangeCertificate task."

Also should expired certificates be removed?
Exchange-certs.PNG
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We are receiving email from external whose email header display a different "Reply-To" address than the "From" address

such as

From: External User <jane@abc.com>

To: Internal User <julia@abc.com>

Reply-To: External User <jane@ourspamfilter.com>

The reply to is appending to our spam filter that we use for incoming and outgoing mail
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Thank you in advance!
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Hallo I recently move my company to Office365 and I add the SPF record as Microsoft provide. I would like to know if I will add +a to the SPF will work as I expect or I will have problem.
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We have 2 AD sites, Exchange 2013 in each site and different domains in each site but same organization. When user in Site A with domain A send an email to external address plus a user in Site B with domain B, Server transfer the message to Exchange in Site B instead of solving the names and creating two copies of the message, one to transfer to Site B and one to be sent through Sent connector. All send connectors are scooped and we check Exchange servers to make sure they are in different Ad sites. If user in Site A with domain A send message only to external address it goes to the right send connector, the problem only occurs when a user from Site B with domain B is copied in the message.

Any help will be appreciated.
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My OS is win 10 pro 64 bit and I have the Office 365 and use Outlook owa.  i managed to switch on Conversations and it is now very convenient as I am able to review the response I sent.  
But sometimes an email is outside the conversation, but it is relevant to that topic.  Is there any way I can lump them to a conversation.  Attached is an example.  i would like to add the email at 6.08 PM to the conversation below with the others.  Thank u for your response
conversations.JPG
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My OS is win 10 prof 64 bit and I use Office 365 Business Essentials and Outlook owa for my Email client.  My email account is MSN the free version.  
I want to reply to an email, and in this response, I would like to embed a previous email from Inbox.  Can this be done, and if Yes, can the Experts kindly show me how it is done.  Thank u.
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gmail label

only want gmails to reach inbox from one sender
admin@ee.com

all the other emails are not important

is there a gmail filter using the word NOT
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Hi,

Im having a CentOS Webpanel Server install with postfix mail service enable and running
I can receive mail from anyone but I cannot send mail at all.

followinf is the msg in the log:

May  3 08:47:10 cloudcast02 postfix/smtp[39358]: connect to mx1.hotmail.com[104.44.194.233]:25: Connection refused

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My OS is win 10 prof 64 bit and I have an Office 365 Business essential account and use Outlook owa.  My main email is MSN account, the free version.   I have also added two more accounts, gmail and earthlink.net.  But how do I switch say to view the gmail or earthlink account emails.  
I do not see them in my main menu where the msn email shows with all its folders.
Thank u for your advise. Regards
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My OS is win 10 prof 64 bits.  I now have msn email the free version, and I am thinking of having a second email, like earthlink - only their email I think at $7 something per month.  Can I please have the experts whether this a good decision and also information from experienced users who have this email account.  Thank u.
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Email Protocols

13K

Solutions

16K

Contributors

Interactions between email servers and clients are governed by email protocols. The three most common email protocols are POP, IMAP and MAPI. Most email software operates under one of these (and many products support more than one).  The correct protocol must be selected, and correctly configured, if you want your email account to work.