AE.Net.Mail not able to connect to outlook.office365.com IMAP

Question

I am finding that I am unable to connect to outlook.office365.com's IMAP server using AE.Net.Mail. The code is very simple:

this._imapClient = new ImapClient(imapServer, username, password, AE.Net.Mail.AuthMethods.Login, port, enableSSL)

I find that I can connect to GMail with no issues, but office365 outlook will not connect, I keep getting timeouts. I've verified the IMAP settings by putting them in to Outlook and in to Thunderbird.

Has anyone else had trouble connecting AE.Net.Mail to Office365's IMAP server?

checkout this previous stackoverflow posting http://stackoverflow.com/questions/670183/accessing-imap-in-c-sharp — MethodMan, Apr 21 '15 at 17:44
posted an answer... was able to solve this by increasing timeouts — gnychis, Jun 18 '15 at 12:59

jstedfast · Answer 1 · 2015-06-18T14:25:05.183

2

AE.Net.Mail is quite buggy and has not seen any development in over a year last I checked. I would recommend using MailKit instead.

I just confirmed that MailKit works with Office365.com with the following code snippet:

using (var client = new ImapClient ()) {
    client.Connect ("outlook.office365.com", 993, true);
    client.Authenticate ("username", "password");

    // get the unread messages
    var uids = client.Inbox.Search (SearchQuery.NotSeen);
    foreach (var uid in uids) {
        var message = client.Inbox.GetMessage (uid);
    }

    client.Disconnect (true);
}

Hope that helps.

edited Jun 18 '15 at 14:25

answered Jun 18 '15 at 12:59

jstedfast

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Thanks for this answer. Also having trouble getting new unread gmail messages with ae.net.mail... so I will try MailKit also – gnychis Jun 18 '15 at 13:00
If you have any questions, you can add an issue to https://github.com/jstedfast/MailKit/issues or you can find my email address on my github page. – jstedfast Jun 18 '15 at 13:01
where might be a good example that shows how to get only unread messages back as a list? – gnychis Jun 18 '15 at 13:34
I've just updated the answer to show how to get the unread messages. – jstedfast Jun 18 '15 at 14:26
thanks much! Trying to replace AE.Net.Mail in my system with MailKit now. Will let you know if I get stuck on anything else. – gnychis Jun 18 '15 at 14:34
Is it possible to get a MailKit.UniqueID from a MimeKit.MimeMessage? As in, if I return a MimeKit.MimeMessage to a function, will it still have access to its UID in some way? I see `MimeKit.MimeMessage.MessageID` but that is of type int, so I'm not sure that it's a UID – gnychis Jun 18 '15 at 14:51
Seems like you don't provide access to `UID`, so I cached it. One more question... with IMAP do I need to refresh the inbox every so often before checking for unread messages? I'm finding that new messages are coming in, but `client.Inbox.Count()` doesn't change and they don't show up in `SearchQuery.NotSeen` ... I have to reconnect to the mail server to see the messages. – gnychis Jun 18 '15 at 18:49
UIDs are not stored on the messages because IMAP doesn't store them on the messages. When you cache them, make sure you track the `folder.UidValidity` value as well, because you'll need to wipe your cache if that value changes. An IMAP server will only notify the client of new messages in response to a few commands: FETCH and NOOP are 2 that I know of off the top of my head. Subscribe to the `folder.CountChanged` event and call `client.NoOp();` – jstedfast Jun 18 '15 at 19:08
woof... never would I have thought I'd need to call something like client.NoOp() to get a ntoification of new messages. Do you have documentation for this kind of stuff somewhere that I'm ignoring, or are you still working on building documentation? I don't know the IMAP protocol well, just in the market for a good client :) – gnychis Jun 18 '15 at 19:11
Check out http://www.mimekit.net/docs/html/M_MailKit_Net_Imap_ImapClient_NoOp.htm – jstedfast Jun 18 '15 at 19:23
IMAP is my current priority for improving the documentation for (mostly by writing samples), but as I'm sure you understand, it's a ton of work and I do this in my spare time :-) – jstedfast Jun 18 '15 at 19:24
Totally understandable! Thanks for the extremely low latency responses, it's a huge help. Adding a Noop definitely solved my problem. I'll definitely reference that sample code. – gnychis Jun 18 '15 at 19:27
Just updated the docs for IMAP NOOP a bit as well: https://github.com/jstedfast/MailKit/commit/c246816b76e91c0d0d1fdd5922eac684106e99ca – jstedfast Jun 18 '15 at 19:50

score 0 · Answer 2 · answered Jun 18 '15 at 12:58

Found I am able to connect by increasing the timeouts:

    _imapClient.ServerTimeout = 120000;
    _imapClient.IdleTimeout = 120000;
    _imapClient.Connect(_imapServer, _port, _enableSSL, false);
    _imapClient.Login(_username, _password);
    _imapClient.SelectMailbox("Inbox");

AE.Net.Mail not able to connect to outlook.office365.com IMAP

2 Answers2