POP3 Error: No X-UIDL header found

The Chilkat MailMan class can fetch emails from a POP3 server in two ways: by sequence number, or by UIDL. When an email is fetched by UIDL, or fetched in a way such that a full mapping of UIDL’s to sequence numbers was retrieved, Chilkat will add an “X-UIDL” header to the Email object that is returned. This allows for […]

Number of Messages in a POP3 Inbox

There is often confusion about the number of messages in a POP3 inbox (for a given user account). Here are the typical scenarios that cause confusion: If your email client such as Outlook or Mozilla Thunderbird seem to show more messages than what Chilkat can see, then make sure you realize which messages are stored locally by Outlook, and which […]

GMail POP3 Authentication — Must Unlock Captcha

If captcha is enabled on your GMail account (and it is enabled by default), then GMail POP3 authentication will fail with this error (even though a correct login/password is provided) **** Connected to pop.gmail.com:995 < +OK Gpop ready for requests from 57.215.212.123 c23pf1097242ibu.22 > USER myaccount@something.com < +OK send PASS > PASS **** < -ERR [AUTH] Username and password not […]

POP3 over HTTP Proxy

ASP: POP3 using HTTP Proxy SQL Server: POP3 using HTTP Proxy C#: POP3 using HTTP Proxy C++: POP3 using HTTP Proxy MFC: POP3 using HTTP Proxy C: POP3 using HTTP Proxy Delphi: POP3 using HTTP Proxy Visual FoxPro: POP3 using HTTP Proxy Java: POP3 using HTTP Proxy Perl: POP3 using HTTP Proxy PHP: POP3 using HTTP Proxy Python: POP3 using […]

Understanding GMail’s Behavior

This blog post will explain GMail in a way that will help you understand it’s seemingly strange behavior. The question that prompted this post is as follows: I am able to read mails from GMail mailbox using MailMan object. Is there any options to delete a mail permanently from GMail mailbox? When I am using the DeleteMail method the mail […]

Exchange Server – POP3, IMAP, and SMTP

Question: May I ask if is possible use Chilkat components to connect to MS Exchange 6.5 and higher ? I am thinking about purchase of MailMan component or other as it is, however I would like read some example in C# for reading emails from Exchange and sending emails via Exchange after connecting to the specified account domain/logname & password. […]

Delete POP3 Email Based on Date / Age?

Question: Is it possible to delete email sitting on the POP3 server based on its age? For example, have it only delete mail from server older than 5 days. Answer: The POP3 protocol itself does not have the direct ability to delete email based on date/time (or any other selection criteria).  The POP3 protocol only provides the ability to delete […]

Not all POP3 emails seen?

Question: Our problem that in the POP3 incoming account there are 400 mails but the developer’s UIDL query can see only the first 251 mails and downloads only 251 mails. Answer: There may be several common reasons.  The first thing to do is to verify number of emails in the mailbox by calling the mailman.GetMailboxCount method.  It sends a STAT […]

GMail Settings for POP3 and IMAP Access

The most common problem with reading email from GMail using Chilkat’s POP3 and IMAP API’s is the following: The user can see certain emails when interactively logged onto GMail with a web browser, but cannot see those emails using Chilkat’s POP3 or IMAP component. The problem is caused by a setting in your GMail account. The default setting causes an […]