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This is the message I get when trying to send emails: "Sending of the message failed. An error occurred while sending mail. The mail server responded: pgbentley101@gmail.com recipient rejected. Please check the message recipient "pgbentley101@gmail.com" and try again."

Title. Thunderbird is a really cool client but it's pretty slow. I blame that on the thousands upon thousands of emails that my hotmail and gmail each hold. I don't necessarily want to delete these emails, but I have seldom a reason to have any email older than 2 months in my thunderbird client slowing and crashing the program whenever I want to combine inboxes.

To this end I went to "Synchronization & Storage" and told it to "Synchronize the most recent 2 months" but it didn't delete the huge cluster of older emails. The next option is to tell TB to delete these emails in the same menu but as I understand it that would also delete them in the server, which I don't want to do for posteriority.

What do I do?

Hello For some time now, Thunderbird has had problems with synchronization of one of the accounts, the other one works OK the message shown in the attachment is displayed poczta.o2.pl server has disconnected. It may have been disabled or there is a network problem Internet is OK, the second account works fine What could be wrong?

I am using Thunderbird for my university account. They provide a tutorial on setting up Thunderbird here.

When I follow these steps, I am unable to send emails. I can fetch my inbox, but that's it. I cannot fetch deleted, sent, draft, or junk items. I cannot see any contacts, I cannot see my calendar.

I am using verison 115.8.1.

I have a client that is responsible for sending emails to all members of a board of directors on a timely manner. All members are on Gmail. The client is also on Gmail. She has created a list in Outlook to send a monthly document. Sends it to the list. Google refuses to execute and does not notify until a day or so later. Error msg says the bulk mailing rule offended.(Rule says it comes into effect when 2500 emails sent but balks at a list of 40...go figure) The solution I am looking for would send to the list members one at a time 10 seconds apart sidestepping the Google Bulk email bulk mailing rule. Is there a way to script and call from an email list?

ticket (134284)

dear sir, i want to swith to your application but i have a very large OLM ( outlook for mac ) file. can i import the OLM file to my Thunderbird account ?

I am using Thunderbird to access my email server that is running based on Postfix & Dovecot. The server is setup to require StartTLS encryption, and accepts IMAP connections on port 143 and SMTP connections on port 587. The server will reject any login attempts on port 25 for unsecured SMTP. When I setup the account in Thunderbird, I specify these ports and set the connection security to STARTTLS.

I am able to retrieve emails without issue using IMAP, but when I attempt to send a message using SMTP, I get the following error: "An error occurred while sending mail: Outgoing server (SMTP) error. The server responded: * OK [CAPABILITY IMAP4rev1 SASL-IR-LOGIN-REFERRALS ID ENABLE IDLE LITERAL + STARTTLS LOGINDISABLED] Dovecot (Ubuntu) ready..."

It appears as if Thunderbird is attempting to send the message over port 25 instead of port 587 using StartTLS as specified. I have already tried removing and re-adding the account to Thunderbird. I know my SMTP configuration is okay because I am able to send emails from port 587 without issue from my webmail client (Roundcube).

Hello, we have a serious issue with labels in Mozilla Thunderbird at our company. We have many computers in the company and 9 labels, but unfortunately, on some computers, they do not synchronize with each other. The problem has persisted for a long time and nothing helps. We ask for assistance.

Best regards, Hubert Mielicki

I have a subcription to the New York Times, but I haven't seen any emails from them since Friday. However, I have seen their articles show up on the computer screen, but when I check email, they are nowhere to be found.

Since I updated to the last Thunderbird version, the messages in my inbox are deleted after one month if I don't "star" them. I don't think I changed any settings? Can somebody help me with this?

I would like to add Separators (lines) to the main window of Thunderbird (see pic). I installed the Message Header Toolbar Customize extension to add spacers and separators to any toolbar, but you can only add separators to the New Message (Write) window (see pic) and the Reply Window (see pic). As you can see, my main window does not have separators. When I click on Customize in the main window or the Mail Space, the separator button is not available for the Mail Space. Why am I not able to put separators on my main window/mail space toolbar?

I get asked for the password for tb_sync, I try to use the password for the email account and that fails. I don't know about any TB password. See image. Account works, just won't sync. I can log into the account directly from a web browser. TIA

After the latest update: Every time I send a message and have selected at recipient, the program searches for a cetificate, allthough encryption is swichted off. A box appears for each recipient for about a minute, unless I stop the search (see image). Essentially, the program acts, as if I had selected encryption. This was newer an issue before latest update.