发送邮件插入！ 990 个字符后电子邮件中间的符号
Sendmail inserting ! symbol in middle of email after 990 characters
我正在使用 sendmail -v rohit@XXXXXXX.com < t.txt 从 sendmail 发送邮件
但是当我使用 outlook 或 gmail 收到邮件时，我会得到额外的！恰好 990 个字符后的字符 https://infoeu.!mytotalconnectcomfort.com。我不明白为什么 sendmail 会插入额外的字符！！ ？
<html><head><meta http-equiv=Content-Type content=text/html; charset=utf-8/></head><body><p>Dear Mr/Ms scure dhf</p><p>Thank you for choosing XXXXXXX.</p><p> In order to live a fulfilling experience with your newly purchased XXXXXXX system, please read carefully the following guidance.</p><p> <strong>1. Domonial owners</strong></p><p>To remotely operate your system, please access the following Internet address: <u><a href=https://tc20e.total-connect.eu/>https://tc20e.total-connect.eu/</a></u></p><p> Your login is: sucre567</p><p> Your password is: sucre567</p><p><strong>2. Sucre Box and Sucre Box + owners</strong></p><p> Sucre Box and Sucre Box + owners can live a fulfilling experience by installing our latest Total Connect Comfort International smartphone application available for both Android phones and IPhones.</p><p> <strong><em>2.1 If you want to use the application</em></strong></p><p> Connect to <u><a href=https://infoeu.mytotalconnectcomfort.com/>https://infoeu.!
mytotalconnectcomfort.com</a></u></p><p>Create an account or login if you already have one</p><p> Access the security section and follow the instructions</p><p>The security login and password will be requested:</p><p>Security login: sucre567</p><p>Security password: sucre567</p><p> And don’t forget to download the app on your smartphone!</p><p><strong><em>2.2 If you don’t want to use the application</em></strong></p><p>To set up and remotely operate your system, please access the following Internet address: <u><a href=https://tc20e.total-connect.eu/>https://tc20e.total-connect.eu/</a></u></p><p>Your login is: sucre567</p><p>Your password is: sucre567</p><p><strong>3. Sucre GPRS owners</strong></p><p>To set up and remotely operate your system, please access the following Internet address: <u><a href=https://tc20e.total-connect.eu/>https://tc20e.total-connect.eu/</a></u></p><p>Your login is: sucre567</p><p> Your password is: sucre567</p></body></html>
SMTP RFC5321 指定消息行的最大长度限制。
Sendmail 中断长行以避免超过限制。
https://www.rfc-editor.org/rfc/rfc5321#section-4.5.3.1.6
修复:
您似乎发送 html 上下文。您可以使用 tidy 程序重新格式化您的 html。它还应该打破长 html 行。
如果句子超过 990 个字符，sendmail 或 mail 会插入一个 !标记。为避免该问题，请使用 \r\n 打破句子，然后将其编码为 %0D%0A（相当于 \r\n）。然后问题就消失了。另外，我们可以修改 /etc/mail/sendmail.cf L=990 为一些更大的值，这也可以解决问题。
来自 sendmail.cf 的行
P=[IPC], F=mDFMuX, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990, T=DNS/RFC822/SMTP, A=TCP $h
我正在使用 sendmail -v rohit@XXXXXXX.com < t.txt 从 sendmail 发送邮件 但是当我使用 outlook 或 gmail 收到邮件时，我会得到额外的！恰好 990 个字符后的字符 https://infoeu.!mytotalconnectcomfort.com。我不明白为什么 sendmail 会插入额外的字符！！ ？
<html><head><meta http-equiv=Content-Type content=text/html; charset=utf-8/></head><body><p>Dear Mr/Ms scure dhf</p><p>Thank you for choosing XXXXXXX.</p><p> In order to live a fulfilling experience with your newly purchased XXXXXXX system, please read carefully the following guidance.</p><p> <strong>1. Domonial owners</strong></p><p>To remotely operate your system, please access the following Internet address: <u><a href=https://tc20e.total-connect.eu/>https://tc20e.total-connect.eu/</a></u></p><p> Your login is: sucre567</p><p> Your password is: sucre567</p><p><strong>2. Sucre Box and Sucre Box + owners</strong></p><p> Sucre Box and Sucre Box + owners can live a fulfilling experience by installing our latest Total Connect Comfort International smartphone application available for both Android phones and IPhones.</p><p> <strong><em>2.1 If you want to use the application</em></strong></p><p> Connect to <u><a href=https://infoeu.mytotalconnectcomfort.com/>https://infoeu.!
mytotalconnectcomfort.com</a></u></p><p>Create an account or login if you already have one</p><p> Access the security section and follow the instructions</p><p>The security login and password will be requested:</p><p>Security login: sucre567</p><p>Security password: sucre567</p><p> And don’t forget to download the app on your smartphone!</p><p><strong><em>2.2 If you don’t want to use the application</em></strong></p><p>To set up and remotely operate your system, please access the following Internet address: <u><a href=https://tc20e.total-connect.eu/>https://tc20e.total-connect.eu/</a></u></p><p>Your login is: sucre567</p><p>Your password is: sucre567</p><p><strong>3. Sucre GPRS owners</strong></p><p>To set up and remotely operate your system, please access the following Internet address: <u><a href=https://tc20e.total-connect.eu/>https://tc20e.total-connect.eu/</a></u></p><p>Your login is: sucre567</p><p> Your password is: sucre567</p></body></html>
SMTP RFC5321 指定消息行的最大长度限制。
Sendmail 中断长行以避免超过限制。
https://www.rfc-editor.org/rfc/rfc5321#section-4.5.3.1.6
修复:
您似乎发送 html 上下文。您可以使用 tidy 程序重新格式化您的 html。它还应该打破长 html 行。
如果句子超过 990 个字符，sendmail 或 mail 会插入一个 !标记。为避免该问题，请使用 \r\n 打破句子，然后将其编码为 %0D%0A（相当于 \r\n）。然后问题就消失了。另外，我们可以修改 /etc/mail/sendmail.cf L=990 为一些更大的值，这也可以解决问题。 来自 sendmail.cf 的行 P=[IPC], F=mDFMuX, S=EnvFromSMTP/HdrFromSMTP, R=EnvToSMTP, E=\r\n, L=990, T=DNS/RFC822/SMTP, A=TCP $h