ETNyx Sorry to hear that, please try docker compose down docker compose up -d Are you trying to lower or bump up attachment size limit?
ETNyx Ok, so you are not trying to change Mailcow limit? Mailcow default should by 100MB so you should be under this limit. This error you post is from what? Did you try to send this attachment from multiple clients? like Thunderbird? from Sogo?
DocFraggle I just uploaded a 83MB attachment without problems. Are you maybe using a reverse proxy and hitting it’s limit?
viki we are using reverse proxy but we did not set any limit. We need to add any parameters in sogo.conf file?
DocFraggle viki we are using reverse proxy but we did not set any limit. What are you using as reverse proxy? 25MB may be it’s default setting @esackbauer as far as I understood the problem occurs while uploading the file via SoGo. @viki is that right?
esackbauer Remember, a file which is 24 MB on your PC will be significally larger for transport in SMTP: https://serverfault.com/questions/1104054/does-the-email-size-limit-include-the-size-of-the-body Also notice that binary attachments must be converted to 7-bit ASCII text. Base64 encoding is used for this, causing 37% overhead (33% by the encoding itself; 4% more by the inserted line breaks; RFC 2045, 6.8). For this reason you may not be able to send attachments despite they are smaller than the limit. So for being able to send a 24 MB attachment you should allow at least 35 MB in the SMTP settings of mailcow
viki DocFraggle We are just using reverse proxy in nginx for website access publically. [unknown] Can you please share example documentation for this. DocFraggle Yes correct [unknown] Can you please share example documentation for this.
DocFraggle IN Mailcow the limit is completly disabled: mailcow/mailcow-dockerizedblob/master/data/conf/nginx/includes/site-defaults.conf#L27 So try to set this parameter in your Nginx reverse proxy config as well BTW, it’s even in the example config in the docs! https://docs.mailcow.email/post_installation/reverse-proxy/r_p-nginx/
viki DocFraggle Already the mentioned parameter is presented in nginx file. [unknown] Can you please share any points or any documentation.
viki I try to send mail from outlook but mail not received. I checked the postfix logs and share it below. Please check and help me to resolve this issue. Jul 1 18:38:56 bd66f787c8b9 postfix/postscreen[420]: CONNECT from [192.168.210.58]:45826 to [172.22.1.253]:25 Jul 1 18:38:56 bd66f787c8b9 postfix/postscreen[420]: ALLOWLISTED [192.168.210.58]:45826 Jul 1 18:38:56 bd66f787c8b9 postfix/smtpd[423]: connect from unknown[192.168.210.58] Jul 1 18:38:56 bd66f787c8b9 postfix/smtpd[423]: Anonymous TLS connection established from unknown[192.168.210.58] to mail.xaasio.com: TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits) Jul 1 18:38:57 bd66f787c8b9 postfix/smtpd[423]: 2F13413B09B: client=unknown[192.168.210.58] Jul 1 18:38:57 bd66f787c8b9 postfix/cleanup[430]: 2F13413B09B: message-id=MA0P287MB154772627850C3E14FC8F61394D32@MA0P287MB1547.INDP287.PROD.OUTLOOK.COM Jul 1 18:39:00 bd66f787c8b9 postfix/cleanup[430]: 2F13413B09B: milter-reject: END-OF-MESSAGE from unknown[192.168.210.58]: 5.7.1 This message does not meet our delivery requirements; from=praveen.raj@xaasio.com to=veera@xaasio.com proto=ESMTP helo=<IND01-MAX-obe.outbound.protection.outlook.com> Jul 1 18:39:00 bd66f787c8b9 postfix/smtpd[423]: disconnect from unknown[192.168.210.58] ehlo=2 starttls=1 mail=1 rcpt=1 data=0/1 quit=1 commands=6/7
